Calcium 500 mg Natural Oyster Shell®

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 Caplet(s) · 2–3 per day

Not Present

• 

  Sundown Naturals Calcium Magnesium & Zinc Caplets

  Pharmaholic4.8(228)

  $20.00
• 

  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
• 

  Geri-Care Calcium with Vitamin D Supplement

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

  $3.94
• 

  Nature's Blend Oyster Shell Calcium Tablets

  Walmart - FM Pharmacy4.8(17)

  $12.60
• 

  Nature's Blend Oyster Shell Calcium with D3 Tablets

  HealthWarehouse.com4.6(27)

  $16.02
• 

  Rugby Oyster Shell Calcium 500 Mg Tablets

  xeteor.com

  $13.99
• 

  Major Oyster Shell Calcium 500 mg Tablets

  Target5.0(11)

  $16.03

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.

• The Vitamin Shoppe

  4.3 (76)

  Vitamin & supplements store

  2180 MacArthur Rd, Whitehall Township, PA 18052

  Directions(610) 437-9004

• GNC

  4.4 (29)

  Vitamin & supplements store

  3020 Tilghman St, Allentown, PA 18104

  Directions(610) 434-0477

• The Muscle Store

  4.7 (64)

  Vitamin & supplements store

  3805 Nazareth Pike, Bethlehem, PA 18020

  Directions(610) 419-8706

• The Vitamin Shoppe

  4.6 (101)

  Vitamin & supplements store

  3862 Dryland Way, Easton, PA 18045

  Directions(610) 253-6924

• Queen's Nutritional Products

  4.5 (135)

  Health food store

  1450 Pennsylvania Ave, Allentown, PA 18109

  Directions(610) 691-6644

• GNC

  3.5 (44)

  Vitamin & supplements store

  2331 Schoenersville Rd, Bethlehem, PA 18017

  Directions(610) 694-0500

• JBN - Just Be Natural

  4.5 (16)

  Vitamin & supplements store

  3864 Courtney St #140, Bethlehem, PA 18017

  Directions(610) 882-0300

• Shaffer Health Center

  4.7 (17)

  Vitamin & supplements store

  Fairgrounds Market, 1825 W Chew St, Allentown, PA 18104

  Directions(484) 201-1952

• A Practical Analysis of Calcium Supplements

  DI Levenson, K Al Ohayon - Alternative Therapies in Women's Health …, 2000 - clinician.com

  … "Oyster shell" calcium carbonate is actually mined from fossilized limestone quarries. … One should be careful with "natural" sources of calcium such as bone meal, fossilized oyster shell, …

  20002 citations

• Research progress on applications of calcium derived from marine organisms

  Y Xu, J Ye, D Zhou, L Su - Scientific reports, 2020 - nature.com

  … role in human health, especially bone health. Marine biological … Algal calcium prepared from oyster shell powder and … Several marine calcium supplements, such as oyster shells …

  202092 citations

• Lead content of calcium supplements

  EA Ross, NJ Szabo, IR Tebbett - Jama, 2000 - jamanetwork.com

  … in the community served by our medical center (University of Florida, Gainesville). The … all "natural" fossilized marine limestone bed (ie, oyster shell) derivatives when used in the calcium …

  2000107 citations

• Marine products for healthcare: functional and bioactive nutraceutical compounds from the ocean

  V Venugopal - 2008 - taylorfrancis.com

  … , and other useful ingredients in health protection and product formulationThe book begins … and shell waste products. Other chapters examine the role of seaweeds as food supplements, …

  2008382 citations

• Antimicrobial Properties of Thermally Processed Oyster Shell Powder for Use as Calcium Supplement

  S Ahn, S Lee, S Lim - Foods, 2025 - mdpi.com

  Oyster shells, though rich in calcium, are mostly discarded and contribute to environmental issues. Developing calcium-… of thermally processed pulverized oyster shells (TPOS) and citric …

  20257 citations

• 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

  … , oyster shell, clam shell, and egg shell as feed supplement for … This method is used when the marine shell has a natural porous, … Generally, oyster shell produced lower yields of calcium …

  2016184 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2011-10-26. DSLD Label ID: 1089. 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.