What is the recommended dosage for Silica (Silicon)?

General: 5-10 mg/day bioavailable silicon (orthosilicic acid or choline-stabilized)

What are the side effects of Silica (Silicon)?

Potential side effects include: Generally well tolerated at recommended doses, Mild gastrointestinal discomfort (rare), Kidney stone risk in predisposed individuals at very high doses.

Can silica supplements improve hair strength?

Silica (silicon dioxide) is a trace mineral involved in collagen synthesis and may support hair structure and tensile strength. Orthosilicic acid, the bioavailable form, has shown promise in clinical trials for improving hair morphology and reducing brittleness. One randomized trial using choline-stabilized orthosilicic acid found improvements in hair strength and elasticity. Consult your healthcare provider.

What form of silica is most bioavailable for hair health?

Orthosilicic acid (OSA) is considered the most bioavailable form of silicon because it is already in the monomeric, water-soluble form that body tissues can absorb directly. Choline-stabilized orthosilicic acid (ch-OSA) has been tested in clinical trials: a 9-month randomized study with 48 women found that ch-OSA supplementation improved hair tensile strength (measured by break force) and elasticity compared to placebo. In contrast, silicon dioxide powder and diatomaceous earth provide silicon in a form that is poorly absorbed from the gut. When comparing silica supplements, look for products that specify ch-OSA or orthosilicic acid rather than generic 'silica' or 'silicon dioxide.'

How does silica contribute to the structural integrity of hair?

Silicon is found in connective tissues throughout the body and plays a role in cross-linking collagen and elastin fibers — structural proteins that form the scaffolding around hair follicles and within the hair shaft itself. Higher silicon content in hair has been associated with greater tensile strength and reduced brittleness in observational studies. Silica may also support the production of keratin-associated proteins by ensuring adequate mineral availability in the follicular papilla. While silica is not a primary hair nutrient in the way biotin or iron are, it may complement other hair-supporting nutrients in a comprehensive approach to structural hair quality. Typical studied doses range from 10–25 mg of elemental silicon daily.

Silica (Silicon)

mineral

Also known as: Silicon, Orthosilicic acid, Choline-stabilized orthosilicic acid, ch-OSA

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About

Silica (silicon dioxide) is a trace mineral involved in collagen cross-linking and connective tissue integrity. Research suggests silicon may support hair shaft strength and thickness by contributing to keratin structure. A randomized trial using orthosilicic acid showed improved hair tensile strength and thickness over 9 months.

How It Works

Contributes to collagen and keratin cross-linking; supports connective tissue integrity around hair follicles; enhances hair shaft mechanical properties.

Evidence For Conditions

Condition	Grade	Studies	Participants
Age-Related Hair Thinning	D	0	--	View →
Brittle Hair and Nails Syndrome	D	0	--	View →

Side Effects

Generally well tolerated at recommended doses
Mild gastrointestinal discomfort (rare)
Kidney stone risk in predisposed individuals at very high doses

Drug & Supplement Interactions

Aluminum-containing antacids (silicon may increase aluminum absorption)
Diuretics (may affect silicon excretion)

Always inform your healthcare provider about all supplements you take.

Related Ingredients

Iron Selenium Zinc

Quick Facts

Dosage: General: 5-10 mg/day bioavailable silicon (orthosilicic acid or choline-stabilized)
Forms: capsule liquid tablet
Natural Sources: Whole grains, Beer, Bananas, Green beans, Mineral water
Upper Limit: Not formally established for supplemental silicon
Best Time: With or without food; bioavailable forms (ch-OSA) preferred over insoluble silica

Evidence Summary

Age-Related Hair Thinning D

Brittle Hair and Nails Syndrome D

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.