Brand: 21st Century

Tablet or PillOff Market
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Net Contents

110 Tablet(s)

Serving Size

1 Tablet(s)

Servings Per Container

Not specified

Supplement Form

Tablet or Pill

Bar Code (UPC/SKU)

7 40985 27504 7

Product Version

Not specified

Suggested Use

Directions: As a dietary supplement; adults take one (1) tablet daily; preferably with a meal for maximum results or as directed by your healthcare provider. Do not exceed recommended dosage. Individual results may vary.

Market Reference

$3.00 – $71.49· 40 listings
  • 21st Century Vitamin

    21st-century-vitamins4.8(459)
    $10.99
  • 21st Century Vitamin D3 mcg

    Walmart - Thrifty White Health4.9(66)
    $16.95
  • 21st Century D3 Tablets

    iHerb4.8(3000)
    $3.00Lowest
  • 21st Century Tablets D3 500

    Target4.8(208)
    $13.99
  • Case of 12-21st Century D3 250 mcg (10,000 IU) Tablets 110 EA

    AmericanPharmaWholesale.com4.8(459)
    $71.49
  • 21st Century Cal Mag Zinc + D3 Tablets

    Swanson Health Products4.7(40000)
    $5.49
  • Case of 6- 21st Century Vit D3 250 mcg (10000 IU) Softgel 110ct

    AmericanPharmaWholesale.com4.8(459)
    $68.64
  • 21st Century Chewable D3 Tablets

    iHerb4.8(709)
    $4.99

Where to Buy Locally

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Research & Studies

  • Therapeutic use of vitamin D and its analogues in autoimmunity

    J M. Fletcher, S A. Basdeo, A C. Allen… - Recent patents on …, 2012 - benthamdirect.com

    … formation and maintenance of healthy bones. Its calcaemic … is now 600 IU/day, with an upper tolerable limit of 4000 IU/day [… in people who take vitamin supplements, (5) attenuation and …

    201232 citations
  • The effects of twenty-one nutrients and phytonutrients on cognitive function: A narrative review

    JE Lewis, J Poles, DP Shaw, E Karhu… - Journal of clinical …, 2021 - pmc.ncbi.nlm.nih.gov

    … supplements such as Ginkgo biloba and vitamins B12 and E have been studied for their effects on brain health and cognitive functioning among healthy … consumed vitamin D3 10,000 IU/…

    202185 citations
  • The influence of vitamin D on COVID-19 outcomes

    LLL Benskin - COVID-19 and Nutraceuticals, A Guidebook …, 2021 - books.google.com

    … which are suboptimal for healthy immune system function. … are based entirely upon promoting bone health, rather than on … taken vitamin D supplements should take D3 10000 IU/day …

    20212 citations
  • The association between vitamin D intake with inflammatory and biochemical indices and mortality in critically ill patients with COVID‐19: A case‐control study

    M Gholamalizadeh, F Rabbani… - Immunity …, 2023 - Wiley Online Library

    … most challenging pandemic of the 21st century. The disease was … It was primarily recognized for supporting bone health … use of vit D supplements (drop of vit D3 10,000 IU, daily) were …

    20234 citations
  • Supplementation and mitigating cognitive decline in older adults with or without mild cognitive impairment or dementia: A systematic review

    Q Fu, J DeJager, EM Gardner - Nutrients, 2024 - mdpi.com

    … supplements in the preservation and promotion of cognitive … showing correlations between health outcomes and intakes or … and found no effect from daily supplementation with 400 IU of …

    202421 citations
  • The effect of vitamin D on the histological structure of liver and lung in mice treated with amphotericin B

    N Alkhafaji, M Ahmed, B Karem - Georgian Medical News, 2024 - researchgate.net

    … Group III (Vitamin D3): mice of this group received Vitamin D3 10000 IU/kg and … liver health, and a deficiency can increase the risk of liver diseases like cirrhosis. Vitamin D supplements …

    20242 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2015-05-22. DSLD Label ID: 45921. 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.