Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Silicic acid, a bioavailable form of silicon, has been studied for its role in supporting bone health. Silicon is a trace mineral found in connective tissues and bone. Scientific interest in silicic acid stems from evidence that silicon may influence bone formation and the synthesis of collagen, an essential protein in bone matrix. Several observational studies have shown that higher dietary silicon intake is associated with greater bone mineral density in both men and women. Furthermore, small clinical trials have found that supplementation with orthosilicic acid (a form of silicic acid) can increase markers of bone formation, such as serum osteocalcin, in postmenopausal women, a group at risk for osteoporosis. However, the exact mechanisms by which silicon supports bone health remain under investigation, and the evidence base is still developing. There is also some variability in the bioavailability of different silicon compounds. While silicic acid is considered one of the more absorbable forms, large-scale, long-term clinical trials demonstrating reductions in fracture risk or significant improvements in bone density are currently lacking. In summary, there is moderate scientific support for the use of silicic acid to support skeletal health, primarily based on mechanistic studies, animal research, and limited human trials, but more robust clinical evidence is needed to make definitive recommendations.

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