Silicon Supplement Ingredient

Impact

Highest effect

Typical dose:5–30 mg

Silicon, often consumed as orthosilicic acid or from sources like bamboo or horsetail extract, is vital for the structural integrity of the nail plate. It helps to cross-link keratin strands, which may decrease brittleness and improve nail surface quality.

Study evidence

2 studies

Silicon in the form of choline-stabilized orthosilicic acid may reduce perceived nail brittleness, but the evidence is preliminary. The supplied research does not establish a clear improvement over placebo or show that all silicon supplements strengthen nails.

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Skin Health

Impact

High effect

Typical dose:10–50 mg

Silicon is a trace mineral that plays a key role in the formation and stabilization of collagen. It activates hydroxylating enzymes involved in collagen synthesis, leading to improved skin strength, elasticity, and hydration. It is often supplemented as orthosilicic acid or from botanical sources like bamboo or horsetail.

Study evidence

16 studies

A specific oral form of Silicon has shown promising effects on skin texture in women with sun-damaged skin, but broader supplement benefits remain uncertain. Much of the supplied research concerns silicone dressings or other topical materials, which cannot establish the effects of oral Silicon.

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Hair Health

Impact

Moderate effect

Typical dose:5–20 mg

Silicon is a trace mineral concentrated in connective tissues. It plays a structural role in forming collagen and is integrated into the hair shaft, contributing to its tensile strength, thickness, and elasticity. Supplementing directly with a bioavailable form of silicon can help improve hair quality and reduce breakage.

Study evidence

2 studies

A specific silicon formulation may help preserve hair strength and reduce perceived brittleness, based on limited research in women. The findings concern the properties of existing hair, and do not establish that silicon supplements stimulate growth or treat hair loss.

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Bone Health

Impact

Situational effect

Typical dose:5–40 mg

Silicon, often supplemented as orthosilicic acid, is concentrated in areas of active bone growth. It is thought to play a role in collagen synthesis and in the early stages of bone calcification, contributing to overall bone strength and health.

Study evidence

13 studies

Silicon may contribute to bone formation, and higher dietary intake is associated with better bone density in some groups. Supplement trials are limited and mixed, so the available evidence does not establish that silicon reliably strengthens bones or prevents fractures.

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Joint Health

Impact

Situational effect

Typical dose:5–40 mg

Silicon, often from sources like bamboo or horsetail extract, is required for the enzyme prolyl hydroxylase, which is essential for collagen formation. It cross-links collagen strands, increasing the strength and integrity of cartilage, bone, and tendons.

Study evidence

4 studies

Silicon supplementation has not shown a clear overall benefit for joint symptoms in the supplied evidence. A specific silicon formulation produced encouraging findings in men with knee osteoarthritis, but the overall trial result was negative and broader joint benefits remain unproven.

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