D-400®

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Serving Size: 1 Tablet(s) · 1 per day

Percent Daily Value (DV)

• 

  21st Century D3-400 Tablets

  21st-century-vitamins4.8(509)

  $4.99
• 

  21st Century Chewable D3 Tablets

  iHerb4.8(709)

  $4.99
• 

  21st Century Tablets D3 500

  Target4.8(208)

  $13.99
• 

  21st Century Calcium 500 + D3 400 Tablets

  21st-century-vitamins4.8(1400)

  $10.99
• 

  21st Century Chewable Tablets

  Walmart - myREVCO4.8(709)

  $14.92
• 

  21st Century D3 Tablets

  Target4.8(511)

  $12.84
• 

  21st Century Calcium Citrate + D3 Maximum

  21st-century-vitamins4.8(4200)

  $20.99
• 

  21st Century Softgels

  Walmart - Thrifty White Health4.8(5400)

  $11.28

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.

• ultimate vitamins plus

  5.0 (19)

  Vitamin & supplements store

  154 Main St, North Andover, MA 01845

  Directions(978) 539-8027

• The Vitamin Shoppe

  3.5 (64)

  Vitamin & supplements store

  300 Andover St #114, Peabody, MA 01960

  Directions(978) 532-1199

• The Vitamin Shoppe

  4.2 (78)

  Vitamin & supplements store

  735 Broadway, Saugus, MA 01906

  Directions(781) 231-7424

• Dr. Ed's Nutrition Shoppe

  4.9 (54)

  Vitamin & supplements store

  1775 Washington St Ste 820, Hanover, MA 02339

  Directions(508) 470-7825

• The Vitamin Shoppe

  4.3 (69)

  Vitamin & supplements store

  23 Mystic View Rd, Everett, MA 02149

  Directions(617) 387-1595

• The Vitamin Shoppe

  4.0 (98)

  Vitamin & supplements store

  291 S Broadway, Salem, NH 03079

  Directions(603) 890-4669

• The Vitamin Shoppe

  4.5 (106)

  Vitamin & supplements store

  274 Daniel Webster Hwy, Nashua, NH 03060

  Directions(603) 888-2631

• The Vitamin Shoppe

  4.2 (49)

  Vitamin & supplements store

  435 Winthrop Ave, Lawrence, MA 01843

  Directions(978) 681-9162

• The emerging role of vitamin D3 in women's health

  SS Khadilkar - The Journal of Obstetrics and Gynecology of India, 2013 - Springer

  … nutrients and prohormones of the 21st century, and a lot of … specific recommendation of a daily supplement of 400 IU (10 … A Dutch study with vitamin D 400 IU over 3.5 years showed …

  201324 citations

• Vitamin D in health and disease: current perspectives

  R Zhang, DP Naughton - Nutrition journal, 2010 - Springer

  … healthy elderly women treated with a high calcium intake, daily supplementation with vitamin D 400 IU … One study revealed that women who used supplemental vitamin D (> 400 IU/day) …

  2010577 citations

• Vitamin D deficiency in the 21st century: a persistent problem among Canadian infants and mothers

  LM Ward - Cmaj, 2005 - cmaj.ca

  … age-old public health problem. It was first described, as rickets, in the mid-17th century by … can be maintained through the intake of supplements and of foods that contain natural or …

  2005112 citations

• Implementation strategies for improving vitamin D status and increasing vitamin D intake in the UK: current controversies and future perspectives: proceedings of the …

  JL Buttriss, SA Lanham-New, S Steenson… - British Journal of …, 2022 - cambridge.org

  … Mandatory monitoring of adherence to supplements at child health surveillance visits will prompt healthcare professionals to check and recommend supplements. Dr Uday suggested …

  202263 citations

• Dietary strategies to maintain adequacy of circulating 25-hydroxyvitamin D concentrations

  M Kiely, LJ Black - Scandinavian journal of clinical and laboratory …, 2012 - Taylor & Francis

  … due to the use of dietary supplements, which is seen as a health-promoting behavior. The report … a stronger “intention to eat healthy” were more likely to be users of dietary supplements. …

  2012163 citations

• Role of fatty acids and micronutrients in healthy ageing: a systematic review of randomised controlled trials set in the context of European dietary surveys of older …

  CHS Ruxton, E Derbyshire… - Journal of human …, 2016 - Wiley Online Library

  … and support healthy ageing. This could involve the judicious use of supplements alongside … Thus, the ageing population could be the greatest healthcare challenge of the 21st Century …

  201656 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2012-08-24. DSLD Label ID: 11178. 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.