Evidence supporting the use of: Molluscs
For the health condition: Osteoporosis

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Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Molluscs, particularly in the form of oyster shell or other marine-derived calcium sources, have been used as dietary supplements to support bone health, including in the treatment and prevention of osteoporosis. The justification for their use is primarily scientific, based on the high calcium content found in mollusc shells. Calcium is a well-established essential mineral for bone health, and its supplementation is commonly recommended for osteoporosis management. Several clinical guidelines recognize calcium supplementation (often alongside vitamin D) as a fundamental strategy for reducing bone loss and fracture risk in osteoporotic patients.

However, the direct evidence supporting the use of mollusc-derived calcium, specifically as compared to other calcium sources (such as calcium carbonate or citrate), is limited. Mollusc shell calcium is mainly calcium carbonate, which is absorbed similarly to other forms under optimal conditions (i.e., with meals and adequate stomach acid). Some studies suggest that naturally sourced calcium may have better bioavailability or include trace elements beneficial to bone metabolism, but robust clinical trials specifically evaluating mollusc-derived calcium for osteoporosis outcomes are lacking. Therefore, while the ingredient is scientifically plausible and supported for its calcium content, the evidence for its unique superiority or specific benefit in osteoporosis is moderate and largely extrapolated from general calcium research.

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