Oyster Shell Calcium 500 +D®

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: 2 Tablet(s) · 1 per day

Percent Daily Value (DV).

• 

  21st Century Calcium 500 + D3 Tablets

  iHerb4.8(773)

  $5.49
• 

  21st Century Calcium 500 + D3 Plus Extra 400 Tablets

  21st-century-vitamins4.8(1100)

  $10.99
• 

  21st Century Calcium 500 + D3 Caplets

  iHerb4.8(1100)

  $5.49
• 

  21st Century Calcium Plus Tablets

  Walmart - Pharma Frills

  $11.11
• 

  21st Century 600 Calcium

  Target4.8(2200)

  $15.99
• 

  21st Century Calcium Plus D3 Softgels

  Pasteur Pharmacy4.7(605)

  $8.99
• 

  21st Century Calcium 600 + D3 Plus Minerals Caplets

  Walmart - iHerb4.8(2200)

  $6.31
• 

  Geri-Care Calcium with Vitamin D Supplement

  Tri-State Surgical Supply and Equipment4.4(9)

  $3.94

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

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• Supplement Superstore

  5.0 (1389)

  Vitamin & supplements store

  8420 Eager Rd, St. Louis, MO 63144

  Directions(314) 961-3935

• Supplement Warehouse

  4.7 (229)

  Vitamin & supplements store

  181 W Crossroads Pkwy Ste F, Bolingbrook, IL 60440

  Directions(630) 965-8526

• The Vitamin Shoppe

  4.4 (223)

  Vitamin & supplements store

  4801 S Hulen St Ste 108, Fort Worth, TX 76132

  Directions(817) 423-4326

• Capitol Nutrition & Supplements

  4.9 (204)

  Vitamin & supplements store

  7030 W 159th St, Orland Park, IL 60462

  Directions(708) 444-2114

• Supplement Superstore

  5.0 (1144)

  Vitamin & supplements store

  14004 Manchester Rd #4514, Ballwin, MO 63011

  Directions(636) 391-1085

• Doctors Supplement Store

  4.6 (28)

  Vitamin & supplements store

  250 Axminister Dr, Fenton, MO 63026

  Directions(877) 846-7122

• Uscriptives

  4.4 (42)

  Vitamin & supplements store

  1535 W Loop S Ste 200, Houston, TX 77027

  Directions(800) 778-7191

• Natural Vitamins

  4.4 (42)

  Manufacturer

  4400 NW 133rd St, Opa-locka, FL 33054

  Directions(305) 265-1660

• Marine 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

  … calcium phosphate samples prepared from Corbicula shell … of calcium phosphate prepared from commercial calcium carbonate. Generally, oyster shell produced lower yields of calcium …

  2016184 citations

• Shell waste management and utilization: mitigating organic pollution and enhancing sustainability

  N Topić Popović, V Lorencin, I Strunjak-Perović… - Applied Sciences, 2023 - mdpi.com

  … supplementation [5]. The CaCO 3 extracted from oyster shells is also used as a food supplement … can be successfully turned into mixed-material medical radiation shields. The shielding …

  2023232 citations

• Snail shell waste threat to sustainability and circular economy: novel application in food industries

  AG Potortì, L Messina, P Licata, E Gugliandolo… - Sustainability, 2024 - mdpi.com

  … shells from the gastropod class for the increasing importance of the reuse of food waste in important health fields like human supplement … Ca in the form of oyster shells is more effective …

  202431 citations

• Exploring the functional properties and utilisation potential of mollusca shell by-products through an interdisciplinary approach

  WH Chung, NSL Tan, M Kim, T Pojtanabuntoeng… - Scientific Reports, 2024 - nature.com

  … adverse health effects if shell-based calcium supplements are … viability of utilising shell waste as a human supplement to fill … on oyster shell has identified that Cd can be attached to shell …

  202412 citations

• Increase of bone mineral density by calcium supplement with oyster shell electrolysate

  T Fujita, M Fukase, H Miyamoto, T Matsumoto, T Ohue - Bone and mineral, 1990 - Elsevier

  … , Oyster shell electrolysate (OSE) was reported to raise serum calcium and increase urinary calcium excretion in vitamin D-… Dietary calcium intake and bone loss from the spine in healthy …

  199067 citations

• Key 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

  … of oyster farming, existing and promising applications are then classified according to the type of raw materials derived from the oyster shell, namely the natural oyster shell (… and health …

  201976 citations

• Vitamin D: What the Label Numbers Mean

  How to read vitamin D amounts on a Supplement Facts panel, the IU-to-mcg conversion, and why %DV matters.

  VitaSuppTrack Editorial· Jun 24, 2026

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: 11096. 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.