BioStacks

Best Silica for Hair

Top 6 products ranked

Last reviewed May 2026

Clinical dose: 5–30 mg

Why Silica for Hair

Silica plays a supporting role in hair. Trace mineral involved in collagen cross-linking, glycosaminoglycan synthesis, and bone mineralization. Population studies associate higher silicon intake (~40 mg/day) with greater bone mineral density. In clinical studies, silica strengthens hair and reduces nail brittleness.

What dose to look for

Clinical studies typically use 5–30 mg of silica. Clinical trials use 5–30 mg elemental silicon/day. ch-OSA studies typically use 6–12 mg Si/day for bone and 10 mg Si/day for skin/hair/nails. Products below this range may not deliver meaningful results.

What form to look for

Avoid silicon dioxide — minimal oral bioavailability. Avoid colloidal silica — poorly absorbed particulate form. Look for choline-stabilized orthosilicic acid (ch-osa) or orthosilicic acid for better absorption.

What the research says

Silica has moderate clinical evidence for hair benefits. A few clinical trials on bone and skin health, but evidence is limited to specific forms like ch-OSA Learn more