Calcium 500 + D3 Plus Extra D3

Single Vitamin & Mineral

Brand: 21st Century

Tablet or PillOn Market

Functions

Click to view full label

Net Contents

60 Tablet(s)

Serving Size

1 Tablet(s)

Servings Per Container

Not specified

Supplement Form

Tablet or Pill

Bar Code (UPC/SKU)

7 40985 27521 4

Product Version

Not specified

Suggested Use

Directions: As a calcium supplement; take one (1) tablet twice daily with any meal or as directed by your healthcare provider.

Market Reference

$5.49 – $183.99· 38 listings
  • 21st Century Calcium 500 + D3 Caplets

    21st-century-vitamins4.8(1400)
    $5.49Lowest
  • 21st Century Calcium 500 + D3 Tablets

    Target4.8(1100)
    $14.99
  • 21st Century Calcium 500 + D3 400 Tablets

    iHerb4.8(1400)
    $10.99
  • 21st Century Calcium Plus Extra D Caplets

    Walmart - Wisermerchant4.8(1400)
    $30.09
  • 21st Century Calcium + D3 Softgels

    21st-century-vitamins4.8(657)
    $9.99
  • 21st Century Calcium 500 + D3 90 Cplts

    Walmart - Pharma Frills4.0(8)
    $11.11
  • 21st Century Calcium Supplement Tablets

    Target4.8(1800)
    $15.99
  • 21st Century Calcium Citrate + D3 Maximum

    Swanson Health Products4.8(4200)
    $8.49

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Research & Studies

  • Minerals and vitamins in bone health: the potential value of dietary enhancement

    JP Bonjour, L Guéguen, C Palacios… - British journal of …, 2009 - cambridge.org

    … defined in France corresponds to P combined with a large intake of calcium phosphate with … ) vitamin D3 plus 600mg Ca. This study showed no effect of the extra 500mg phylloquinone (…

    2009206 citations
  • Vitamin D in health and disease: current perspectives

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

    … D3 is immediately converted to vitamin D. Excess UVB rays transform previtamin D3 into … that daily calcium (500 mg) and vitamin D (400 IU) supplementation was associated with an …

    2010577 citations
  • Overview of the conference “Vitamin D and Health in the 21st Century: an Update”

    PM Brannon, EA Yetley, RL Bailey… - The American journal …, 2008 - academic.oup.com

    … form vitamin D3 (cholecalciferol), which the vitamin D binding … However, calcium and vitamin D supplementation during … over pathways convert excess vitamin D to inactive metabolites …

    2008251 citations
  • Optimal vitamin D status: a critical analysis on the basis of evidence-based medicine

    …, C Mathieu, D Vanderschueren… - The Journal of …, 2013 - academic.oup.com

    … , a daily intake of 500–700 IU of vitamin D 3 is sufficient to … vitamin D excess and few against vitamin D deficiency (… to estimate active calcium absorption in otherwise healthy individuals …

    2013391 citations
  • Vitamin D and bone health; Potential mechanisms

    E Laird, M Ward, E McSorley, JJ Strain, J Wallace - Nutrients, 2010 - mdpi.com

    … Excess non-hydroxylated vitamin D is stored in the liver, adipose tissue and muscle [24]. … trial [115] supplementing with 500 IU D3 and 1000 mg calcium/d over the same intervention …

    2010508 citations
  • Vitamin D: evidence-based health benefits and recommendations for population guidelines

    WB Grant, SJ Wimalawansa, P Pludowski, RZ Cheng - Nutrients, 2025 - mdpi.com

    … extra-skeletal benefits and optimal thresholds for vitamin D. In … 1000 mg/day of calcium significantly reduced the risk of hip … a monthly maintenance dose of 50,000 IU of D3 until delivery; …

    2025162 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2015-03-25. DSLD Label ID: 43591. 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.