Sunex Vitamin D3 2,000 IU | Cholecalciferol | Supports Bone Health & Immunity | Softgels | 100 Count*
$63.95 USD
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Estimated delivery between December 16 and December 20.
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Additional Information
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Manufacturer Country
USA
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Product Amount
100 softgels
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Gross Weight
0.1lb (45g)
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Suggested Use
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As a dietary supplement, adults take one (1) softgel capsule daily or as directed by a health care professional.
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Warning
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Keep out of reach of children. Do not use if the safety seal is damaged or missing. Store in a cool, dry place and away from direct light.
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Benefits of Sunex Vitamin D3 2,000 IU | Cholecalciferol | Supports Bone Health & Immunity | Softgels | 100 Count*
Discover the key benefits that make our product stand out
Fill Essential Nutrient Gaps
Boost Immune & Energy Systems
Support Healthy Aging
Enhance Overall Wellness
About Sunex Vitamin D3 2,000 IU | Cholecalciferol | Supports Bone Health & Immunity | Softgels | 100 Count*
Sunex SuVitamin D3 2,000 IU – Foundational Bone, Immune, and Muscle Function Support Daily.*
Support your body's foundational health needs with Sunex SuVitamin D3 2,000 IU, a premium vitamin D3 supplement providing 2,000 International Units (IU) of cholecalciferol per easy-to-swallow softgel capsule. This 100-count bottle delivers over three months of daily vitamin D support*, helping you maintain optimal vitamin D levels* to support bone health, immune function, muscle strength, and overall wellness*—particularly valuable during winter months or for those with limited sun exposure.
Made in the USA, this high-potency D3 formula helps maintain vitamin D status, essential for millions globally. Known as the "sunshine vitamin" because the body produces it in response to sun exposure, vitamin D plays crucial roles in calcium absorption, bone mineralization, immune system function, muscle performance, and mood regulation*. However, many factors—geographic location, season, indoor lifestyle, sunscreen use, skin tone, and age—can significantly limit vitamin D production, making supplementation valuable for maintaining adequate levels*.
Vitamin D3 (cholecalciferol) is the superior form of vitamin D supplementation, identical to what the body produces naturally from sunlight exposure. Research consistently shows vitamin D3 is more effective than vitamin D2 (ergocalciferol) at raising and maintaining blood vitamin D levels*, making D3 the preferred choice for supplementation. The 2,000 IU dosage represents a moderate-to-high potency that research suggests may help support optimal vitamin D status* in most individuals while remaining well within safe intake levels established by health authorities.
Fat-soluble vitamin delivery in softgel form with oil carriers (soybean and corn oil) supports vitamin D3 absorption. As a fat-soluble vitamin, vitamin D requires dietary fat for supports absorption. Oil-based softgel provides a fat matrix that helps support the absorption of this fat-soluble vitamin.*, ensuring the vitamin D3 is bioavailable and readily utilized by the body. This eliminates the need to carefully time supplementation with fat-containing meals, though taking with food may still enhance absorption further*.
Bone health support represents one of vitamin D's most well-established roles. Vitamin D is essential for calcium absorption in the intestines*—without adequate vitamin D, the body cannot effectively absorb dietary calcium regardless of calcium intake levels. Research published in journals including the Journal of Clinical Endocrinology & Metabolism has extensively documented vitamin D's critical role in bone mineralization*, skeletal development*, and maintaining bone density* throughout life. Adequate vitamin D status may help support bone strength* and structural integrity*.
Immune system function benefits from adequate vitamin D status, an area of extensive research interest. Vitamin D receptors exist throughout immune cells, and vitamin D plays regulatory roles in both innate and adaptive immunity*. Studies have examined vitamin D's potential to support healthy immune responses*, with research published in Nutrients and other peer-reviewed journals investigating the relationship between vitamin D status and immune function*. While research continues, evidence suggests adequate vitamin D may help support balanced immune system activity*.
Muscle function and strength depend partly on adequate vitamin D levels. Research has examined the relationship between vitamin D status and muscle strength, performance, and recovery*. Vitamin D receptors exist in muscle tissue, and studies suggest vitamin D may play roles in muscle protein synthesis* and muscle function*. Research in older adults particularly has found associations between vitamin D status and muscle strength*, balance*, and physical performance*—factors affecting fall risk and functional independence.
Mood and seasonal wellness connections to vitamin D have attracted significant research attention. Scientific studies suggest that Vitamin D is important for supporting healthy mood balance and emotional wellness.* This is especially valuable during periods when sun exposure is limited, such as in winter, to help maintain optimal nutrient status necessary for well-being.* The mechanisms may involve vitamin D's interactions with neurotransmitter systems and brain function*.
Cardiovascular wellness, metabolic health, and cellular function represent additional areas where vitamin D's roles are being investigated. Vitamin D receptors exist in numerous tissues beyond bones—including cardiovascular tissues, pancreatic cells, and others—suggesting widespread physiological roles. Research continues examining vitamin D's potential involvement in cardiovascular health*, glucose metabolism*, insulin sensitivity*, and various cellular processes*. While many questions remain, the breadth of tissues expressing vitamin D receptors suggests this vitamin's importance extends beyond skeletal health.
Deficiency prevalence makes vitamin D supplementation particularly relevant. Studies examining vitamin D status in various populations consistently find substantial percentages with insufficient or deficient levels—particularly among those living in northern latitudes, those with darker skin tones (requiring more sun exposure for equivalent D production), older adults (whose skin produces D less efficiently), those who are overweight or obese, individuals who spend limited time outdoors, those who consistently use sunscreen, and those with certain health conditions affecting absorption. Supplementation represents a practical approach to achieving adequate status* when sunlight and dietary sources prove insufficient.
The 2,000 IU dosage is well-supported by research and guidelines. While the Institute of Medicine's Recommended Dietary Allowance (RDA) for vitamin D is 600-800 IU for most adults, many researchers and health organizations suggest these levels may be insufficient for optimal vitamin D status, with recommended supplementation doses often ranging from 1,000-4,000 IU daily. The 2,000 IU dose falls comfortably within this range while remaining far below the tolerable upper intake level (4,000 IU daily for adults), providing effective vitamin D support* with excellent safety margin.
Important: This is a dietary supplement supporting nutritional wellness*. It is not intended to diagnose, treat, cure, or prevent any disease including seasonal mood changes, bone diseases, or immune disorders. For diagnosed vitamin D deficiency or health conditions, consult healthcare providers who can assess individual needs and recommend appropriate interventions.
Understanding the Top 4 Pain Points
Pain Point #1: Limited Sun Exposure and Indoor Lifestyle
Modern indoor lifestyles dramatically reduce sunlight exposure compared to historical human experience. Office work, long commutes, indoor recreation, and climate-controlled environments mean many people spend the vast majority of waking hours indoors, with limited opportunity for the sun exposure necessary for vitamin D production. Even when outdoors, clothing covers most skin, further limiting the surface area available for vitamin D synthesis.
Geographic limitations particularly affect those living in northern latitudes (above 37 degrees North or below 37 degrees South) where winter sunlight intensity is insufficient for meaningful vitamin D production. During winter months at these latitudes, the sun's angle means UVB rays—the specific wavelength that triggers vitamin D production—don't penetrate the atmosphere adequately. This creates a "vitamin D winter" lasting approximately November through March where sunlight cannot support vitamin D production regardless of outdoor time.
Sunscreen protection, while crucial for skin cancer prevention, blocks the UVB radiation needed for vitamin D synthesis. Proper sunscreen use with SPF 30 or higher can reduce vitamin D production by 95-99%. This creates a dilemma—protecting skin from UV damage while maintaining vitamin D status—that supplementation helps resolve by providing vitamin D without requiring unprotected sun exposure.
Skin tone considerations mean individuals with darker skin require significantly more sun exposure to produce equivalent vitamin D amounts compared to those with lighter skin. Melanin acts as a natural sunscreen, protecting against UV damage but also reducing vitamin D production efficiency. Research consistently finds vitamin D insufficiency is more prevalent among people with darker skin tones living in temperate climates, where sunlight may be insufficient to overcome melanin's protective effects.
Age-related decline in vitamin D production means older adults produce 50-70% less vitamin D from the same sun exposure compared to younger adults. This reduced synthetic capacity, combined with often limited outdoor activity, increased indoor time, and medication interactions, makes older adults particularly vulnerable to vitamin D insufficiency despite adequate sun availability.
The urbanization factor means tall buildings, pollution, and urban environments block and scatter UV radiation, further reducing vitamin D production potential for city dwellers. Combined with indoor lifestyles, this urbanization effect contributes to widespread vitamin D insufficiency in modern populations.
Finding convenient vitamin D3 supplementation providing 2,000 IU daily to help maintain adequate vitamin D status* addresses the reality that modern lifestyles, geographic location, and protective behaviors make obtaining sufficient vitamin D from sunlight alone increasingly difficult for many people.
Pain Point #2: Bone Health Concerns and Calcium Absorption
Osteoporosis and osteopenia represent major public health concerns, particularly for aging populations. These conditions—characterized by reduced bone density and increased fracture risk—affect millions, with fractures causing significant morbidity, mortality, healthcare costs, and reduced quality of life. While calcium intake receives primary attention for bone health, vitamin D's essential role in calcium absorption means adequate vitamin D is equally critical for maintaining bone density*.
Calcium absorption efficiency depends directly on vitamin D status. Without adequate vitamin D, the body may absorb only 10-15% of dietary calcium; with sufficient vitamin D, absorption increases to 30-40%. This means that inadequate vitamin D essentially negates careful calcium supplementation or dietary calcium intake—the calcium simply isn't absorbed efficiently and passes through the digestive system unused.
Peak bone mass during young adulthood determines lifelong skeletal health and fracture risk in later years. Optimizing bone development during growth years and early adulthood—when bone mass accumulation is most active—requires adequate vitamin D to support calcium absorption and bone mineralization*. Inadequate vitamin D during these critical years may result in suboptimal peak bone mass, increasing lifelong osteoporosis and fracture risk.
Age-related bone loss accelerates in older adults, particularly postmenopausal women experiencing hormonal changes affecting bone metabolism. Maintaining adequate vitamin D status may help support bone density* during these higher-risk periods. Research examining vitamin D supplementation in older adults has investigated whether adequate vitamin D might help support bone health* and reduce fracture risk, with some studies suggesting potential benefits particularly when combined with adequate calcium*.
Dental health shares similar vitamin D dependence to skeletal health. Tooth development, mineralization, and the integrity of jaw bone supporting teeth all require adequate vitamin D for proper calcium utilization*. Research has examined associations between vitamin D status and dental health*, with some evidence suggesting adequate vitamin D may support oral health* and tooth integrity*.
The fracture consequence of poor bone health extends beyond pain to loss of independence, reduced mobility, increased mortality (particularly for hip fractures in elderly), and diminished quality of life. Proactive bone health support* through adequate vitamin D and calcium represents preventive investment with substantial potential long-term benefits.
Finding high-potency vitamin D3 supplementation (2,000 IU) that supports efficient calcium absorption and bone health* addresses the foundational nutritional requirement for maintaining skeletal integrity throughout life, particularly for those at higher risk due to age, sex, or limited sun exposure.
Pain Point #3: Immune System Support Needs
Seasonal immune challenges during fall and winter months coincide with declining vitamin D levels from reduced sun exposure. This observation has led to extensive research investigating potential connections between vitamin D status and immune function. While the relationship is complex and research continues, vitamin D's roles in immune regulation* have been documented in numerous studies.
Immune cell function appears influenced by vitamin D status. Vitamin D receptors exist on various immune cells including T cells, B cells, antigen-presenting cells, and others, suggesting vitamin D plays regulatory roles in immune responses*. Research has examined how vitamin D may affect both innate immunity (immediate, non-specific defenses) and adaptive immunity (learned, specific responses), with studies suggesting vitamin D helps modulate immune activity.
Inflammatory balance represents another investigated area. Appropriate immune function requires balanced responses—robust enough to address challenges but not excessive. Research suggests vitamin D may play roles in regulating inflammatory responses*, helping maintain balanced rather than excessive inflammation. Studies published in journals including Frontiers in Immunology have examined these regulatory mechanisms.
Antimicrobial peptide production is one specific mechanism by which vitamin D may support immune function*. Research has found that vitamin D influences production of cathelicidin and defensins—natural antimicrobial compounds produced by immune cells. These antimicrobial peptides represent part of the innate immune response, and adequate vitamin D may support their production*.
The winter immune challenge when colds and flu peak coincides with the period of lowest vitamin D levels in temperate climates. While correlation doesn't prove causation, this temporal relationship combined with vitamin D's documented immune roles has generated substantial research interest in whether adequate vitamin D status might support immune resilience*, particularly during seasons when vitamin D production from sunlight is minimal.
Autoimmunity research has also examined vitamin D's potential roles, given that vitamin D receptors exist on immune cells and vitamin D appears to influence immune regulation. Some research has investigated whether adequate vitamin D status might relate to balanced immune responses*, though this remains an active area of investigation with many questions remaining.
Finding vitamin D3 supplementation providing 2,000 IU daily to help maintain adequate vitamin D status that supports healthy immune system function* addresses the relationship between vitamin D and immunity, particularly relevant during months when sun exposure doesn't support adequate vitamin D production.
Pain Point #4: Low Energy, Muscle Weakness, and Mood Concerns
Fatigue and low energy complaints are common, and while causes are multifactorial, vitamin D status has been investigated as one potential contributing factor. Vitamin D receptors exist in numerous tissues throughout the body, suggesting widespread physiological roles. Some research has examined whether vitamin D insufficiency might relate to fatigue*, with studies investigating whether supplementation might support energy levels* in those with low vitamin D status.
Muscle weakness and function show documented relationships to vitamin D status. Research consistently finds associations between vitamin D levels and muscle strength*, particularly in older adults. Studies have examined whether vitamin D supplementation might support muscle function*, reduce fall risk*, and improve physical performance*. The mechanisms may involve vitamin D receptors in muscle tissue and vitamin D's potential roles in muscle protein synthesis* and muscle fiber function*.
Balance and fall risk particularly in older populations show correlations with vitamin D status. Falls represent major sources of injury, fractures, and subsequent morbidity in elderly populations. Research has investigated whether vitamin D supplementation might support balance* and reduce fall risk*, with some studies suggesting potential benefits particularly at higher supplementation doses combined with calcium*.
Mood and emotional wellness connections to vitamin D have attracted substantial research attention. The observation that mood sometimes varies seasonally—with challenges more common during winter months when sunlight and vitamin D production are reduced—has led to investigation of vitamin D's potential roles in mood regulation*. While the relationship is complex and incompletely understood, some research suggests adequate vitamin D status may support emotional wellness*.
Cognitive function research represents another emerging area. Vitamin D receptors exist in brain tissue, and some studies have examined whether vitamin D status might relate to cognitive performance*, memory*, and brain health*. While research is preliminary, the presence of vitamin D receptors throughout the nervous system suggests potential roles in neurological function* worthy of continued investigation.
The seasonal pattern of low mood coinciding with reduced sunlight exposure and declining vitamin D levels has been particularly noted in populations living at higher latitudes with dramatic seasonal variation in daylight. While many factors contribute to seasonal mood changes, adequate vitamin D status may represent one supportive factor for emotional wellness* during darker months.
Finding vitamin D3 supplementation (2,000 IU) that supports adequate vitamin D status for muscle function, energy, and overall wellness* addresses the broad physiological roles of this essential nutrient that extend beyond skeletal health to affect muscle performance, physical function, mood, and vitality.
How Sunex Vitamin D3 2,000 IU Provides Support
Maintaining Optimal Vitamin D Status
The 2,000 IU dosage is well-positioned to help achieve and maintain optimal vitamin D blood levels in most individuals. Research examining various supplementation doses finds that 1,000-2,000 IU daily typically raises blood vitamin D levels (measured as 25-hydroxyvitamin D) into the optimal range (30-50 ng/mL or 75-125 nmol/L) in individuals starting from insufficient levels*. This dose provides substantially more than the RDA (600-800 IU) while remaining well within safe limits.
Cholecalciferol form (vitamin D3) is preferentially effective compared to ergocalciferol (D2). Research published in the American Journal of Clinical Nutrition and other journals has consistently found that D3 supplementation is more effective at raising and maintaining blood vitamin D levels* compared to equivalent doses of D2. Meta-analyses examining multiple studies confirm D3's superior efficacy*, making it the optimal choice for supplementation.
Oil-based softgel delivery enhances absorption of this fat-soluble vitamin. The soybean and corn oil in the softgel provide the lipid matrix necessary for vitamin D3 dissolution and absorption*. Studies examining vitamin D absorption find that taking it with fat-containing meals or in oil-based preparations enhances bioavailability* compared to dry tablet forms or fasting administration.
Year-round supplementation helps maintain consistent vitamin D status despite seasonal variations in sunlight availability. Rather than cycling supplementation with seasons—which would result in fluctuating vitamin D levels throughout the year—consistent daily supplementation maintains stable vitamin D status*, ensuring adequate levels even during winter months when sun-based production ceases at higher latitudes.
By providing *well-absorbed vitamin D3 in a scientifically-supported dosage, Sunex helps address the widespread vitamin D insufficiency affecting many modern populations despite adequate sunlight existing seasonally.
Supporting Bone Health and Calcium Utilization
Enhanced calcium absorption represents vitamin D's primary mechanism for supporting bone health. Research has extensively documented that vitamin D increases intestinal calcium absorption efficiency* by promoting expression of calcium-binding proteins in intestinal cells. This increased absorption efficiency ensures dietary and supplemental calcium is actually utilized by the body* rather than excreted unused.
Bone mineralization support requires adequate vitamin D for the process by which calcium and phosphate are deposited into bone matrix, creating strong, dense bone. Research shows that Vitamin D is essential for the process of calcium utilization and proper bone mineralization.* Adequate intake supports skeletal development and helps maintain overall bone density throughout life.*
Parathyroid hormone regulation is influenced by vitamin D status. When vitamin D is insufficient and calcium absorption drops, parathyroid hormone (PTH) increases to maintain blood calcium levels by pulling calcium from bones—essentially sacrificing long-term bone health to maintain immediate calcium homeostasis. Adequate vitamin D helps maintain normal PTH levels*, protecting bones from excessive calcium removal.
Research in older adults has specifically examined vitamin D supplementation for bone health outcomes. Studies including the Women's Health Initiative and various meta-analyses have investigated whether vitamin D supplementation (often combined with calcium) might support bone density* and reduce fracture risk*. While results vary, some studies suggest benefits particularly at higher doses (800-2,000 IU) and in populations with lower baseline vitamin D status*.
By supporting *efficient calcium absorption and bone mineralization, vitamin D3 supplementation helps maintain the nutritional foundation necessary for skeletal health throughout life.
Supporting Immune Function
Immune cell regulation by vitamin D has been documented in extensive research. Studies have found that vitamin D influences maturation, differentiation, and function of various immune cells* including T lymphocytes, B lymphocytes, dendritic cells, and macrophages. Research published in journals including Journal of Investigative Medicine has examined these regulatory mechanisms.
Antimicrobial peptide induction represents one specific mechanism. Research has found that vitamin D enhances production of cathelicidin and defensins*—antimicrobial compounds that represent part of innate immunity. Studies examining this mechanism suggest adequate vitamin D may support production of these natural antimicrobial defenses*.
Inflammatory modulation appears to be influenced by vitamin D status. Research suggests vitamin D may help regulate inflammatory responses*, supporting balanced rather than excessive inflammation. Studies examining inflammatory markers in relation to vitamin D status and supplementation have investigated these relationships, with some finding that adequate vitamin D may support healthy inflammatory responses*.
Seasonal considerations make vitamin D particularly relevant for immune support during winter months. The coincidence of lowest vitamin D levels (from minimal sun exposure) with peak season for respiratory challenges has led to substantial research investigating potential connections. While the relationship is complex, maintaining adequate vitamin D status year-round* may support consistent immune function regardless of season*.
By helping *maintain adequate vitamin D status that supports immune cell function and antimicrobial defenses, vitamin D3 supplementation may contribute to resilient immune system activity.
Supporting Muscle, Mood, and Overall Wellness
Muscle function benefits from adequate vitamin D have been documented particularly in older populations. Research examining vitamin D supplementation in elderly individuals has found improvements in muscle strength*, physical performance*, and balance* in some studies. The mechanisms may involve vitamin D receptors in muscle tissue and vitamin D's potential roles in muscle protein metabolism* and neuromuscular function*.
Fall risk reduction has been investigated in studies examining vitamin D supplementation in older adults. Meta-analyses examining multiple studies have found that vitamin D supplementation (particularly at doses of 700-1,000+ IU) may help reduce fall risk* in elderly populations—an important outcome given falls' role in fractures, injury, and loss of independence. The benefits may relate to improved muscle strength and balance*.
Mood support research has examined whether vitamin D supplementation might benefit emotional wellness*. While studies show mixed results and the relationship is complex, some research suggests that correcting vitamin D insufficiency through supplementation might support mood*, particularly in those with low baseline vitamin D levels. Studies published in journals including Nutrients have investigated these potential connections.
Energy and vitality connections to vitamin D remain under investigation. Some research has examined whether vitamin D insufficiency might contribute to fatigue and whether supplementation might support energy levels*. While mechanisms aren't fully understood, vitamin D's widespread presence in tissues throughout the body suggests potential roles in cellular function* and metabolism* that might influence energy status.
By supporting *adequate vitamin D levels throughout the body's tissues, vitamin D3 supplementation may contribute to muscle function, physical performance, mood, and overall sense of wellness.
Complete Ingredient Profile
Active Ingredient:
- Vitamin D3 (as Cholecalciferol) – 2,000 IU (50 mcg) – Fat-soluble vitamin essential for calcium absorption*; supports bone mineralization*; plays roles in immune function*, muscle function*, and cellular health*; superior form compared to vitamin D2; research-supported dosage for maintaining optimal status*
Softgel Components:
- Gelatin – Softgel capsule shell; provides easy-to-swallow delivery format
- Glycerin – Softgel component; maintains capsule flexibility and stability
- Water – Softgel component
Oil Carriers:
- Soybean Oil – Provides lipid matrix supporting vitamin D3 absorption as fat-soluble vitamin*
- Corn Oil – Additional lipid carrier enhancing vitamin D3 bioavailability*
Product Specifications:
- Form: Softgel capsules
- Count: 100 softgels per bottle
- Serving Size: 1 softgel
- Servings Per Container: 100 (over 3 months supply)
- Potency: 2,000 IU (50 mcg) per softgel
- Manufacturing: USA
Percentage Daily Value: 2,000 IU = 250% of Daily Value (based on 800 IU RDA for adults)
Important Notes:
- Take with food for enhanced absorption
- Fat-soluble vitamin—oil-based softgel enhances bioavailability
- Not for children under 18 without medical supervision
- Consult healthcare provider if pregnant, nursing, or have medical conditions
Allergen Information: Contains soy (from soybean oil). Softgel contains gelatin (bovine source).
Why Choose Sunex Vitamin D3 2,000 IU?
1. Optimal Potency Dosage 2,000 IU per softgel provides scientifically-supported vitamin D supplementation dose for maintaining optimal status*.
2. Superior D3 Form Cholecalciferol (D3) is more effective than D2 at raising and maintaining blood vitamin D levels*.
3. Enhanced Absorption Oil-based softgel provides fat matrix necessary for optimal vitamin D3 absorption as fat-soluble vitamin*.
4. Convenient Once-Daily Single softgel daily makes supplementation simple and easy to maintain consistently.
5. Three-Month Supply 100 softgels provide over 3 months of daily vitamin D support in one bottle.
6. Made in USA Domestic manufacturing ensures quality oversight and adherence to supplement standards.
7. Research-Supported Benefits Vitamin D3 has strong scientific research documenting its important role in supporting bone health*, healthy immune function*, muscle performance*, and general physical well-being*.
8. Easy-to-Swallow Small softgel format is easier to swallow than large tablets for many users.
9. Year-Round Support Maintains consistent vitamin D status regardless of season or sun availability.
10. Excellent Value Affordable supplementation with 100+ days supply providing cost-effective daily vitamin D support*.
How to Use for Optimal Results
Standard Dosage: Take 1 softgel daily as a dietary supplement.
Timing:
- With meals containing some dietary fat for optimal absorption
- Morning or evening – timing less critical than consistency
- Same time daily helps establish routine and ensure compliance
Absorption Enhancement:
- Take with fat-containing meal (even small amount of fat enhances absorption)
- The oil-based softgel already provides some fat, but dietary fat may further enhance bioavailability
Important Guidelines:
- Do not exceed recommended dose unless directed by healthcare provider
- Consistent daily use maintains stable vitamin D levels
- Not for children under 18 without medical supervision
- Pregnant or nursing women should consult healthcare providers
- Those with medical conditions or taking medications should consult providers
Usage Tips for Maximum Benefits
1. Take Daily Without Fail Consistent supplementation maintains stable vitamin D levels—skipping doses reduces effectiveness.
2. Pair with Calcium If supplementing calcium, take together as vitamin D enhances calcium absorption*.
3. Get Tested Consider having vitamin D blood levels tested (25-hydroxyvitamin D) to confirm supplementation is achieving optimal status.
4. Don't Rely Solely on Sun Even with supplementation, sensible sun exposure (with sun protection) provides additional benefits beyond vitamin D.
5. Store Properly Keep in cool, dry place away from heat and direct light to maintain potency.
6. Combine with Healthy Lifestyle Vitamin D works best alongside balanced diet, regular exercise, and adequate sleep.
7. Be Patient 8-12 weeks of consistent supplementation may be needed to substantially raise vitamin D levels from insufficient status.
8. Consider Higher Doses in Winter Some healthcare providers recommend slightly higher winter doses to compensate for zero sun-based production.
9. Monitor for Adequate Intake The 2,000 IU dose is safe for most, but very high doses (>4,000 IU daily long-term) should only be taken under medical supervision.
10. Stay Hydrated Adequate water intake supports overall supplement absorption and bodily functions.
Quality & Safety Information
Manufacturing Standards: Sunex Vitamin D3 is manufactured in the USA following Good Manufacturing Practices (GMP) for dietary supplements.
Safety Profile: Vitamin D3 at 2,000 IU daily is well within safe limits. The tolerable upper intake level set by the Institute of Medicine is 4,000 IU daily for adults, providing substantial safety margin.
Not for Everyone:
- Not for children under 18 without healthcare provider guidance
- Pregnant or nursing women should consult providers
- Those with hypercalcemia or kidney disease should consult physicians as vitamin D affects calcium metabolism
Potential Considerations:
- Hypercalcemia risk: Very high vitamin D intake over extended periods can cause elevated blood calcium—avoid exceeding 4,000 IU daily without medical supervision
- Medication interactions: Vitamin D may interact with certain medications including some diuretics, steroids, and weight-loss drugs
- Medical conditions: Those with granulomatous disorders, lymphoma, or kidney disease should consult physicians
Side Effects: At recommended doses, side effects are rare. Excessive intake may cause:
- Nausea, vomiting
- Weakness, confusion
- Kidney problems
- Elevated blood calcium
Storage: Store in cool, dry place. Do not use if safety seal is damaged. Keep out of reach of children.
Who Will Benefit from This Product?
Limited Sun Exposure: Those with indoor occupations, northern latitude residents, or those who avoid sun exposure.
Older Adults: Individuals over 50 with reduced vitamin D production efficiency and increased bone health needs.
Darker Skin Tones: Those with increased melanin requiring more sun exposure for equivalent vitamin D production.
Winter Season: Anyone during fall and winter months when sun angle prevents adequate vitamin D production.
Bone Health Focus: Individuals concerned about osteoporosis risk, fracture prevention, or calcium absorption optimization*.
Immune Support Seekers: Those wanting immune system support* particularly during challenging seasons.
Muscle Function: Older adults or athletes seeking muscle strength and performance support*.
Mood Support: Individuals experiencing seasonal mood changes or seeking mood wellness support*.
Vegetarians/Vegans: Plant-based dieters with limited dietary vitamin D (mainly found in fatty fish and fortified foods).
Overweight/Obese: Individuals with higher body weight who may require more vitamin D to achieve optimal status.
Understanding Key Ingredients
Vitamin D3 (Cholecalciferol)
Vitamin D3 is the form of vitamin D produced in human skin when exposed to UVB radiation from sunlight. It's also found in animal-source foods like fatty fish, fish liver oils, and egg yolks. Cholecalciferol is converted in the liver to 25-hydroxyvitamin D (the storage form measured in blood tests), then in kidneys to the active hormone form 1,25-dihydroxyvitamin D (calcitriol).
Research foundation for vitamin D is extensive, with thousands of studies examining its roles in human health. The Institute of Medicine published comprehensive vitamin D dietary reference intakes, and major health organizations including the Endocrine Society have position statements on vitamin D supplementation.
Bone health research has most robustly documented vitamin D's essential role. Studies consistently find vitamin D necessary for calcium absorption and bone mineralization*. Research examining vitamin D deficiency clearly demonstrates skeletal consequences including rickets in children and osteomalacia in adults.
Immune function research has examined vitamin D's regulatory roles. Studies published in journals including Frontiers in Immunology and Journal of Investigative Medicine have investigated mechanisms by which vitamin D influences immune cell function* and inflammatory responses*.
The optimal level debate continues among researchers. While the Institute of Medicine considers 20 ng/mL (50 nmol/L) sufficient, many vitamin D researchers advocate for optimal levels of 30-50 ng/mL (75-125 nmol/L) for full health benefits*. The 2,000 IU dosage is designed to help achieve levels in this optimal range.
Scientific References
Research on vitamin D:
-
Vitamin D and Bone Health:
- Holick MF. "Vitamin D deficiency." New England Journal of Medicine. 2007;357(3):266-281.
- https://pubmed.ncbi.nlm.nih.gov/17634462/
-
Vitamin D3 vs D2:
- Tripkovic L, et al. "Comparison of vitamin D2 and vitamin D3 supplementation in raising serum 25-hydroxyvitamin D status: a systematic review and meta-analysis." American Journal of Clinical Nutrition. 2012;95(6):1357-1364.
- https://pubmed.ncbi.nlm.nih.gov/22552031/
-
Vitamin D and Immune Function:
- Aranow C. "Vitamin D and the immune system." Journal of Investigative Medicine. 2011;59(6):881-886.
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3166406/
-
Vitamin D and Falls:
- Bischoff-Ferrari HA, et al. "Fall prevention with supplemental and active forms of vitamin D: a meta-analysis of randomised controlled trials." BMJ. 2009;339:b3692.
- https://pubmed.ncbi.nlm.nih.gov/19797342/
Note: These references are for educational purposes. This product supports nutritional wellness.
Important Disclaimer
FDA/FTC Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Product Classification: Sunex SuVitamin D3 is a dietary supplement supporting nutritional wellness through vitamin D3 supplementation*. It is not a drug, pharmaceutical treatment, or medical therapy.
Not Medical Treatment: This product supports general nutritional wellness and helps maintain adequate vitamin D status*. It does not treat, cure, or prevent diseases including osteoporosis, depression, infections, or other medical conditions. For diagnosed vitamin D deficiency or health conditions, seek appropriate medical care.
Individual Results Vary: Responses to vitamin D supplementation vary based on baseline vitamin D status, body weight, sun exposure, diet, genetics, and other factors. The information provided is for educational purposes and should not be considered medical advice.
Consult Healthcare Professionals: Always consult with a qualified healthcare provider before starting vitamin D supplementation, especially if you:
- Have medical conditions (particularly kidney disease, hypercalcemia, granulomatous disorders, or lymphoma)
- Take medications (particularly those affecting calcium metabolism)
- Are pregnant or nursing
- Are under 18 years of age
- Have concerns about your vitamin D status
Testing Considerations: Consider having vitamin D blood levels tested (25-hydroxyvitamin D) to establish baseline status and confirm supplementation achieves optimal levels. Discuss testing and appropriate supplementation doses with healthcare providers.
Quality Information: While manufactured following standards in the USA, statements about this product have not been evaluated by the FDA. Use only as directed.
Frequently Asked Questions
REQUIRED FDA/FTC DISCLAIMER:
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary. This supplement is intended to support general wellness and should not replace a varied, balanced diet and healthy lifestyle. Always consult with a qualified healthcare professional before beginning any dietary supplement, especially if you are pregnant, nursing, have a medical condition, or are taking prescription medications.
Important Safety & Usage Warning:
Do not exceed recommended dose. Individuals who are pregnant, nursing, taking medication, or who have a pre-existing medical condition should consult a healthcare professional before use.
Keep out of reach of children. Store in a cool, dry place.
Disclaimer:*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary. This supplement is intended to support general wellness and should not replace a varied, balanced diet and healthy lifestyle. Always consult with a qualified healthcare professional before beginning any dietary supplement, especially if you are pregnant, nursing, have a medical condition, or are taking prescription medications.

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