Oyster Shell Calcium 500 +D Extra Vitamin D Value Size®
Single Vitamin & MineralBrand: 21st Century
Functions
Net Contents
400 Tablet(s)
Serving Size
2 Tablet(s)
Servings Per Container
200
Supplement Form
Tablet or Pill
Bar Code (UPC/SKU)
7 40985 22727 5
Product Version
1107
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; 2 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: 2 Tablet(s) · 1 per day
| Ingredient | Amount Per Serving | % Daily Value |
|---|---|---|
| Vitamin D3(Cholecalciferol) | 800 IU | 200% |
| Calcium(Oyster) | 1000 mg | 100% |
Percent Daily Value (DV).
Other Ingredients
Target Groups
Label Claims
Directions & Suggested Use
Suggested/Recommended/Usage/Directions
DIRECTIONS: As a dietary supplement, take two tablets daily with any meal, or as directed by your healthcare provider. Do not exceed recommended dosage.
Warnings & Precautions
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
Contains a shellfish ingredient (oyster shell).
Formulation re: Does NOT Contain
No Sugar, Yeast, Preservatives or Artificial Flavors.
FDA Statements
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.
FDA Disclaimer Statement
DIETARY SUPPLEMENT
Other Label Statements
General Statements: All Other Content
Unconditionally guaranteed for purity, freshness and label potency.
Brand IP Statement(s) re: (c), (TM), (SM)
Compare To Active Ingredients In Os Cal(R) 500 +D*
General Statements: All Other Content
D3
Brand IP Statement(s) re: (c), (TM), (SM)
Compare To Active Ingredients In Os Cal(R) 500 +D*
General Statements: All Other Content
Regular exercise and a healthy diet with enough calcium helps teen and young adult Caucasian and Asian women maintain good bone health and may reduce their high risk of osteoporosis later in life. Adequate calcium intake is important, but daily intakes above about 2,000 mg are not likely to provide any additional benefit. Now with extra Vitamin D. Vitamin D is essential for use of calcium and necessary for healthy bones, teeth, and cartilage.*
General Statements: All Other Content
SUPER VALUE
Brand IP Statement(s) re: (c), (TM), (SM)
*Os Cal(R) 500 +D is a registered trademark of Glaxo Smith Kline, Pittsburgh, PA 15230 ** Compared to the original formula.
Seals/Symbols
MADE IN USA
General: Product/Version Code
1107
Manufacturer & Distributor
Manufacturer
21st Century HealthCare, Inc.
2119 S. Wilson Street, Tempe, AZ, 85282, USA
Market Reference
21st Century Calcium Plus Tablets
Walmart - Pharma Frills$11.1121st Century Calcium 1000 mg Tablets
21st-century-vitamins4.7(3800)$6.4921st Century Calcium 500 + D3 Caplets
iHerb4.8(1100)$5.4921st Century Calcium 500 + D3 Plus Extra 400 Tablets
21st-century-vitamins4.8(1100)$10.9921st Century Calcium Supplement Tablets
Swanson Health Products4.7(788)$13.1921st Century Calcium Plus Extra D Caplets
Walmart - Wisermerchant$30.09Geri-Care Calcium with Vitamin D Supplement
Tri-State Surgical Supply and Equipment4.4(9)$3.94LowestMajor Oyster Shell Calcium Tablets
Medicaleshop4.5(31)$5.60
Where to Buy Locally
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.
Holland & Barrett - Prescot Tesco
5.0 (2)Vitamin & Supplements Shop
Cables Retail Park, Steley Way, Prescot L34 5NQ
Holland & Barrett - Liverpool City Centre
4.3 (51)Vitamin & Supplements Shop
21-23 Church St, Liverpool L1 1DA
Holland & Barrett - St Helens Tesco
3.9 (17)Vitamin & Supplements Shop
Tesco Extra, Linkway E, Saint Helens WA9 3AL
Holland & Barrett - Bootle
4.4 (16)Vitamin & Supplements Shop
Mons Square New Strand Medway 51-52, Bootle L20 4SR
Holland & Barrett - Widnes
3.9 (51)Vitamin & Supplements Shop
14 Albert Rd, Widnes WA8 6JE
Holland & Barrett - Liverpool One
4.1 (23)Vitamin & Supplements Shop
Unit 64, ONE, S John St, Liverpool L1 8BJ
Holland & Barrett - Cheshire Oaks Outlet
4.5 (28)Vitamin & Supplements Shop
Unit 94, The Designer Outlet Centre, Cheshire Oaks Way, Cheshire Oaks, Ellesmere Port CH65 9JJ
Holland & Barrett - Birkenhead
4.1 (23)Vitamin & Supplements Shop
6 Borough Rd, Grange Precinct, Birkenhead CH41 2XX
Research & Studies
Calcium and Vitamin D
R Bartl, B Frisch - Osteoporosis: Diagnosis, Prevention, Therapy, 2009 - Springer
… Naturally derived calcium (dolomite, bone meal, oyster shells… in the first decade of the 21st century. At the cellular level, … consideration that vitamin D3 is more potent than vitamin D2. …
2009EFFECT OF ADDING VITAMIN D3 AND VARIOUS PARTICLE SIZE OF OYSTER SHELL TO DIETS IN CALCIUM AND VITAMIN D3 CONCENTRATION, EGG SHELL …
AM Rashed, AA Yousif - Anbar Journal of Agricultural Sciences, 2022 - ajas.uoanbar.edu.iq
… ( 1994 ) This study investigates the inclusion of vitamin D3 and oyster shells with varying particle sizes as ingredients in the diets provided to laying hens. The diets are primarily …
2022Shell waste management and utilization: mitigating organic pollution and enhancing sustainability
N Topić Popović, V Lorencin, I Strunjak-Perović… - Applied Sciences, 2023 - mdpi.com
… oyster shells as alkalinity-releasing filling materials, shells can … oyster shell powder can also improve mechanical properties of plastic and paper, when used as biofiller with particle size …
2023232 citationsReview on the extraction of calcium supplements from eggshells to combat waste generation and chronic calcium deficiency
A Singh, N Kelkar, K Natarajan, S Selvaraj - Environmental Science and …, 2021 - Springer
… data was not an accurate measure for the national population sizes. Average … vitamin D3 and eggshell powder helped in enhancing bone density and preventing the increase of calcium …
202146 citationsMarine shells: Potential opportunities for extraction of functional and health-promoting materials
Y Hou, A Shavandi, A Carne, AA Bekhit… - Critical Reviews in …, 2016 - Taylor & Francis
… an average length range of 50–100 and width range of 25–50 … calcium phosphate prepared from commercial calcium carbonate. Generally, oyster shell produced lower yields of calcium …
2016184 citationsKey insights, tools, and future prospects on oyster shell end-of-life: a critical analysis of sustainable solutions
M Bonnard, B Boury, I Parrot - Environmental Science & …, 2019 - ACS Publications
… Starting with a presentation of the environmental impact of oyster farming, existing and … from the oyster shell, namely the natural oyster shell (NOS), the calcined natural oyster shell (…
201976 citations
Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2012-07-25. DSLD Label ID: 11099. 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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