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Types of Silica: Forms & Bioavailability

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

Forms Comparison

FormBioavailabilityBest For
Choline-Stabilized Orthosilicic Acid (ch-OSA / BioSil)HighBest-studied and most bioavailable form — directly provides absorbable silicon
Horsetail Extract (Equisetum arvense)Low-ModerateTraditional herbal source of silica — variable silicon content and absorption
Colloidal SilicaLowCommonly marketed but poorly absorbed — large particle size limits bioavailability
Bamboo ExtractLow-ModeratePlant-based silica source with high silicon content but limited absorption data

Choline-Stabilized Orthosilicic Acid (ch-OSA / BioSil)

Bioavailability: High. Best for: Best-studied and most bioavailable form — directly provides absorbable silicon.

Horsetail Extract (Equisetum arvense)

Bioavailability: Low-Moderate. Best for: Traditional herbal source of silica — variable silicon content and absorption.

Colloidal Silica

Bioavailability: Low. Best for: Commonly marketed but poorly absorbed — large particle size limits bioavailability.

Bamboo Extract

Bioavailability: Low-Moderate. Best for: Plant-based silica source with high silicon content but limited absorption data.

Full Silica Guide

References

  1. (). Effect of oral intake of choline-stabilized orthosilicic acid on skin, nails and hair in women with photodamaged skin. Archives of Dermatological Research. DOI
  2. (). Dietary silicon intake is positively associated with bone mineral density in men and premenopausal women of the Framingham Offspring cohort. Journal of Bone and Mineral Research. DOI
  3. (). Orthosilicic acid stimulates collagen type 1 synthesis and osteoblastic differentiation in human osteoblast-like cells in vitro. Bone. DOI