Calcium 500+D3 plus Extra D3®
Single Vitamin & MineralBrand: 21st Century
Functions
Net Contents
200 Tablet(s)
Serving Size
1 Tablet(s)
Servings Per Container
Not specified
Supplement Form
Tablet or Pill
Bar Code (UPC/SKU)
7 40985 27520 7
Product Version
501078-0314
Label Analysis
Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.
2 distinct active ingredients are disclosed in Supplement Facts.
Every active ingredient discloses a specific amount per serving.
2 ingredients report a %DV; 1 meet or exceed 100% DV.
This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.
Allergen Guide
Contains
- Shellfish
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.
Supplement Facts
Serving Size: 1 Tablet(s) · 2 per day
| Ingredient | Amount Per Serving | % Daily Value |
|---|---|---|
| Vitamin D3(Cholecalciferol) | 600 IU | 150% |
| Calcium(Oyster) | 500 mg | 50% |
Not Present
Other Ingredients
Target Groups
Label Claims
Directions & Suggested Use
Suggested/Recommended/Usage/Directions
Directions: As a calcium supplement, take one (1) tablet twice daily with any meal or as directed by your healthcare provider. Do not exceed recommended dosage.
Warnings & Precautions
Precautions re: Allergies
Contains a shellfish ingredient (oyster shell).
Precautions re: All Other
Do not exceed recommended dosage.
Precautions re: Pregnant or Nursing or Prescription Medications
Warning: Consult a healthcare provider prior to use if: pregnant, nursing, on medications, have a medical condition or are planning a medical procedure.
Precautions re: All Other
Stop use and contact a physician if adverse reactions occur.
Precautions re: Children
Keep out of reach of children.
Precautions re: All Other
Do not use if product appears to be tampered with or seal is broken.
Storage
Storage
Store at room temperature.
Formulation
Formula re: Contains
500 mg Calcium 600 IU Vitamin D3
Formula re: Contains
Contains a shellfish ingredient (oyster shell).
Formula re: Contains
Calcium is an important mineral for supporting bone health. Calcium also works to support muscle and nerve function. Vitamin D3 is added to assist with Calcium absoprtion and as support for immune function. Adequate Calcium and Vitamin D3 as part of a healthful diet, along with physical activity, may reduce the risk of osteoporosis in later life.
Formulation re: Does NOT Contain
No added Sugar, Yeast, Preservatives or Artificial Flavors.
FDA Statements
FDA Statement of Identity
Calcium Supplement
FDA Disclaimer Statement
This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Other Label Statements
General Statements: All Other Content
Compare Active Ingredients to Os-Cal Extra D3
General Statements: All Other Content
Support for Bone Health Easy to Swallow
Seals/Symbols
Guaranteed quality Laboratory tested
General Statements: All Other Content
Individual results may vary.
Brand IP Statement(s) re: (c), (TM), (SM)
Os-Cal is a registered trademark of GlaxoSmithKine, Pittsburgh, PA 15230
Manufacturer & Distributor
Manufacturer
21st Century HealthCare, Inc.
2119 S. Wilson St., Tempe, AZ, 85282, USA
Market Reference
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 Plus D3 1000 mg Tablets
21st-century-vitamins4.7(3700)$6.49
Where to Buy Locally
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GNC
4.7 (197)Vitamin & supplements store
2 Pennsylvania Plaza Ste 29B, New York, NY 10121
The Vitamin Shoppe
3.9 (84)Vitamin & supplements store
32 Court St, Brooklyn, NY 11201
GNC
4.4 (88)Vitamin & supplements store
753 Broadway Spc 753, New York, NY 10003
Pure Essentials Supplements
5.0 (1)Vitamin & supplements store
121 Varick St, New York, NY 10013
GNC
4.0 (224)Vitamin & supplements store
134-136 Fulton St, New York, NY 10038
The Vitamin Shoppe
4.3 (183)Vitamin & supplements store
12 4th Ave, Brooklyn, NY 11217
The Vitamin Shoppe
4.4 (98)Vitamin & supplements store
257 8th Ave, New York, NY 10011
GNC
3.6 (101)Vitamin & supplements store
2 Broadway, New York, NY 10004
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 citationsVitamin 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 citationsOverview 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 citationsVitamin 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 citationsOptimal 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 citationsVitamin 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 2019-10-23. DSLD Label ID: 207518. 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.
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