Oyster Shell Calcium 500®

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.

Serving Size: 1–2 Tablet(s) · 1 per day

Percent Daily Value (DV).

• 

  21st Century Calcium 500 + D3 Tablets

  21st-century-vitamins4.8(773)

  $5.49
• 

  21st Century Calcium 500 + D3 Caplets

  21st-century-vitamins4.8(1100)

  $5.49
• 

  21st Century Calcium 500 + D3 Plus Extra 400 Tablets

  iHerb4.8(1100)

  $10.99
• 

  21st Century Calcium 500 Mg (Oyster Shell) Tablets 90 Count (Pack of 2)

  GoSupps.com4.0(1)

  $34.99
• 

  Geri-Care Calcium with Vitamin D Supplement

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

  $3.94Lowest
• 

  21st Century Calcium Plus Extra D Caplets

  Walmart - Wisermerchant

  $30.09
• 

  Major Oyster Shell Calcium Tablets

  Medicaleshop4.5(31)

  $5.60
• 

  Rugby Oyster Shell Calcium 500mg Tablets Supports Strong Bones & Teeth Health 60 Count

  Target

  $9.67

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 - Luton

  3.9 (53)

  Vitamin & Supplements Shop

  Unit 142, 144 The Mall, Luton LU1 2LJ

  Directions0330 058 2640

• First Health

  4.8 (21)

  Health food shop

  52 Market Hall, Luton LU1 2TA

  Directions01582 451170

• Optimal Health

  4.3 (12)

  Vitamin & Supplements Shop

  4 Hill Top, Redbourn, St Albans AL3 7JG

  Directions01442 506369

• Nature's Bounty Co. Ltd / Solgar vitamins and minerals / Nestle

  4.4 (30)

  Vitamin & Supplements Shop

  Beggars Ln, Tring HP23 5PT

  Directions01442 890355

• Holland & Barrett - Dunstable

  4.6 (33)

  Vitamin & Supplements Shop

  North, Unit 37 Broadwalk, Dunstable LU5 4RH

  Directions0330 058 2640

• Holland & Barrett - Hitchin

  4.3 (18)

  Vitamin & Supplements Shop

  116 Bancroft, Hitchin SG5 1LS

  Directions0330 058 2640

• Holland & Barrett

  4.6 (16)

  Vitamin & Supplements Shop

  Unit 44 Queensway, Stevenage SG1 1EE

  Directions0330 058 2640

• Holland & Barrett - Hemel Hempstead

  3.4 (25)

  Vitamin & Supplements Shop

  Marlowes, Unit 187c Marlowes, Centre, Hemel Hempstead HP1 1BB

  Directions0330 058 2640

• 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

• 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

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

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

  … The CaCO 3 extracted from oyster shells is also used as a food supplement for Ca … material medical radiation shields. The shielding sheets comprising 0.3 mm thick layers of oyster shell …

  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

• 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

• Effects of water-soluble calcium supplements made from eggshells and oyster shells on the calcium metabolism of growing rats

  SY Jang, YJ Jeong, TK Kwon, JH Seo - 2010 - kumel.medlib.dsmc.or.kr

  … manufactured with seaweed powder was expected to positively affect skeletal health, and both the eggshell and the oyster shell calcium supplements were thought to act similarly. …

  201010 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: 11111. 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.