D3 400 IU

Suggested Use

As a dietary supplement for adults; take one (1) softgel daily with the meal of your choice.

• 

  Spring Valley Vitamin D3 Softgels

  Walmart4.7(152)

  $4.88
• 

  Nature's Truth D3 400IU Tablets

  Nature's Truth4.4(29)

  $6.99
• 

  Bluebonnet Nutrition Rainforest Animalz Vitamin D3 400 IU

  Fruitful Yield4.9(190)

  $10.76
• 

  Nature Made D3 + K2 Softgels

  Walgreens.com4.4(185)

  $18.99
• 

  Now Liquid Vitamin D-3

  iHerb4.8(2300)

  $6.14
• 

  Solgar Vitamin D3 IU

  Target4.8(895)

  $15.99
• 

  Source Naturals Vitamin D 3 IU

  Smallflower.com4.8(2000)

  $5.80
• 

  Nature's Truth Vitamin D3 400 IU

  Nature's Truth4.8(278)

  $9.99

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

• GNC

  4.1 (37)

  Vitamin & supplements store

  719 Fox Run Blvd, Prince Frederick, MD 20678

  Directions(410) 535-1219

• The Vitamin Shoppe

  4.6 (237)

  Vitamin & supplements store

  3144 Crain Hwy, Waldorf, MD 20603

  Directions(301) 638-7110

• TRANSFORMING LIVES GLOBALLY LLC

  5.0 (2)

  Vitamin & supplements store

  150 Post Office Rd Unit 818, Waldorf, MD 20604

  Directions(833) 726-5263

• GNC

  4.2 (33)

  Vitamin & supplements store

  23415 Three Notch Rd Space #R-40, California, MD 20619

  Directions(301) 737-2821

• VIP Nutrition™ - Legacy Organix™

  5.0 (3)

  Herbalist

  3073 Leonardtown Rd, Waldorf, MD 20603

  Directions(240) 346-9676

• The Vitamin Shoppe

  4.4 (104)

  Vitamin & supplements store

  2460 Market St NE #701, Washington, DC 20018

  Directions(202) 269-0809

• e-NutritionStore.com

  5.0 (10)

  Vitamin & supplements store

  6010 Meadowridge Center Dr K, Elkridge, MD 21075

  Directions(443) 483-3340

• GNC

  3.4 (34)

  Vitamin & supplements store

  3038 Festival Way, Waldorf, MD 20601

  Directions(301) 645-5205

• The VITamin D and OmegA-3 TriaL (VITAL): rationale and design of a large randomized controlled trial of vitamin D and marine omega-3 fatty acid supplements for the …

  JAE Manson, SS Bassuk, IM Lee, NR Cook… - Contemporary clinical …, 2012 - Elsevier

  … ], 1g/day) supplements in the primary prevention of … or supplements, occurrence of endpoints, and cancer and vascular risk factors. Self-reported endpoints will be confirmed by medical …

  2012703 citations

• Vitamin D3: Role in chronic inflammatory disorders.

  AG BANERJEE, A Roy, R Banerjee - … Public and Preventive Health, 2025 - researchgate.net

  … Results: Vitamin D3 modulates both innate and adaptive immunity by enhancing … – 4000 IU/day maintains optimal serum concentrations (30–60 ng/mL; 75–150 nmol/L), with the best anti…

  2025

• The Dose–Response Effects of Vitamin D3 on Serum 25-Hydroxyvitamin D Levels in Vitamin D-Deficient Young Indian Women: A Randomized Controlled …

  CH Peris, S Selvam, S Swaminathan, R Rangarajan… - Nutrients, 2026 - mdpi.com

  2026

• … IU Vitamin D3 Supplements on the Serum Levels of Selected Cytokines Involved in Cytokine Storm: A Randomized Clinical Trial in Adults with Vitamin D …

  DA Bader, A Abed, BA Mohammad, A Aljaberi… - Nutrients, 2023 - mdpi.com

  … COVID-19 or chronic medical conditions, such as osteoporosis, cancer, endocrine disorders… However, the US Endocrine Society suggests daily 1500–2000 IU [46]. A total of 400 IU VD …

  202317 citations

• Why modest but widespread improvement of the vitamin D status is the best strategy?

  R Bouillon - Best Practice & Research Clinical Endocrinology & …, 2011 - Elsevier

  … vitamin D supplement of 200 IU and more recently 400 IU for … Whether higher amounts of vitamin D for infants and children … that vitamin D has beneficial effects on bone health and that …

  201125 citations

• Influence of vitamin D supplementation by sunlight or oral D3 on exercise performance

  AT CARSWELL, SJ Oliver, LM Wentz… - … and science in …, 2018 - pmc.ncbi.nlm.nih.gov

  … of vitamin D status on exercise performance in young healthy … that endurance performance was best in those with proposed … We propose the 400 IU·d −1 oral vitamin D 3 dose from the …

  2018108 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2012-10-01. DSLD Label ID: 13269. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.