Vitamin D3 10mcg (400IU), 120 Capsules
Pure Encapsulations Vitamin D3 at 10mcg (400 IU) delivers cholecalciferol, the same form the body synthesizes from sunlight, to support calcium absorption, bone integrity, and immune function.
May be a fit for
- Adults seeking daily low-dose D3 maintenance alongside dietary sources
- Individuals with moderate sun exposure needing modest vitamin D3 supplementation
- Practitioners protocols requiring conservative D3 dosing for sensitive patients
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Pure Encapsulations Vitamin D3 at 10mcg (400 IU) delivers cholecalciferol, the same form the body synthesizes from sunlight, to support calcium absorption, bone integrity, and immune function. Formulated in a hypoallergenic base free of unnecessary excipients, it suits those with sensitivities or individuals seeking a conservative, maintenance-level dose.
Why It's Worth Considering: Pure Encapsulations is a practitioner-trusted brand known for rigorous raw material testing and minimal-additive formulations; this lower-dose option fits well for those supplementing alongside dietary intake or a multivitamin already containing D3.
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Pure Encapsulations · 120 CapsulesMake it part of your routine.
Take 1-5 capsules daily. Consume with food.
Read the complete labelProduct details
Supplement facts & complete label
Serving Size: 1 vegetarian capsule
Amount Per Serving
vitamin D ... 10 mcg (400 IU)
(as cholecalciferol)(D3)
other ingredients: hypo-allergenic plant fiber
(cellulose), vegetarian capsule (cellulose, water)
Not to be taken by pregnant or lactating women. It is recommended that individuals taking more than 2, 000 i.u. vitamin D per day have their blood levels monitored.
*These statements have not been evaluated by the Food & Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.
Label directions
Take 1-5 capsules daily. Consume with food.
Source: authorized supplier catalog · September 06, 2026. Formulas and labels can change. Check the packaging you receive.
Who it may suit
May be a fit for
- Adults seeking daily low-dose D3 maintenance alongside dietary sources
- Individuals with moderate sun exposure needing modest vitamin D3 supplementation
- Practitioners protocols requiring conservative D3 dosing for sensitive patients
- Children or older adults where clinician recommends gentle 400IU D3 intake
Considerations
- Hypercalcemia (elevated blood calcium)
- Sarcoidosis or other granulomatous diseases
- Severe kidney disease without medical supervision
- Taking thiazide diuretics (monitor calcium)
Compatibility & interactions
Works Well With
Take Separately From
No significant interactions identified. Always consult your healthcare provider.
What to expect over time
Serum Levels Rise
Measurable increase in 25(OH)D
Immune Support
Improved innate immune function
Mood & Energy
Reduced fatigue and improved mood
Optimal Range
Target 50-80 ng/mL achieved
Based on clinical studies on vitamin D3 supplementation. Response varies by baseline levels, body weight, and skin tone.
Compare the options
Compare Vitamin D Forms
D3 vs D2 vs D3+K2
| Feature | D3 (Cholecalciferol) | D2 (Ergocalciferol) | D3 + K2 Combo |
|---|---|---|---|
| Source | Animal (lanolin/lichen) | Plant/fungal | Animal + bacterial |
| Potency | 87% more effective at raising serum D | Baseline | Same as D3 + K2 synergy |
| Half-Life | ~2-3 weeks | ~2-3 days | ~2-3 weeks |
| Best For | General supplementation | Vegan-only option | Bone + cardiovascular health |
| Evidence | Strong (gold standard) | Moderate | Strong (synergistic) |
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Coverage varies by product and brand.
393 product and brand ratings and mentions across 6 sources.
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Explore the source sentiment summary
Strong consensus that Vitamin D supplementation is beneficial, but 400IU is widely criticized as far too low based on current research.
This summary includes broader brand discussion. Individual experiences are not evidence of product effectiveness.
A few useful answers.
Research & further reading
More category questions
How much vitamin D3 should I take daily?
Most functional medicine practitioners recommend 5,000 IU daily for adults with normal BMI, and up to 10,000 IU for those with obesity or severe deficiency. The Endocrine Society recommends maintaining serum 25(OH)D levels between 40-60 ng/mL. Test your levels every 3-6 months.
Is vitamin D3 better than D2?
Yes. D3 (cholecalciferol) is 87% more effective at raising and maintaining serum vitamin D levels compared to D2 (ergocalciferol). D3 also has a longer half-life. D2 is only preferred by strict vegans who cannot use lanolin-sourced D3 — lichen-based D3 is the vegan alternative.
Should I take vitamin D3 with vitamin K2?
Yes, especially at doses above 2,000 IU. Vitamin D3 increases calcium absorption from food. Without K2, that calcium can deposit in arteries instead of bones. K2 (MK-7 form) activates osteocalcin (puts calcium in bones) and matrix GLA protein (keeps calcium out of arteries).
Can I take too much vitamin D?
Toxicity is rare below 10,000 IU/day in healthy adults but possible with chronic high-dose use without monitoring. Symptoms of excess include hypercalcemia (nausea, kidney stones, confusion). Always pair high-dose D3 with K2 and test 25(OH)D levels every 3-6 months.
When is the best time to take vitamin D3?
Take with your largest meal containing fat — D3 is fat-soluble and absorption increases 30-50% when taken with dietary fat. Morning or afternoon is preferred over evening, as some studies suggest late-night D3 may interfere with melatonin production.
How long does it take for vitamin D levels to increase?
Serum 25(OH)D typically rises within 1-2 weeks of supplementation. Reaching optimal range (50-80 ng/mL) takes 2-3 months at 5,000 IU/day from a deficient baseline. Higher loading doses (10,000 IU for 8 weeks then maintenance) can accelerate this.
Supplement information is provided for education and is not a substitute for personalized medical advice. Supplements are not intended to diagnose, treat, cure or prevent disease. Read the current product label before use.