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Silica

connective tissue support

Evidence · Grade C
Human trial evidenceTraditional use

Silica is a trace mineral thought to be involved in connective tissue health, including bone, skin, and hair, with ongoing research into its potential benefits.

Silica, in its bioavailable form such as orthosilicic acid, is a trace element that plays a role in bone health. It is believed to contribute to bone matrix formation and mineralization, which are crucial for maintaining bone density and strength, particularly in the context of osteoporosis.

Quick answer

What it is: Silica, in its bioavailable form such as orthosilicic acid, is a trace element that plays a role in bone health.

May support:Osteoporosis

Evidence:Evidence · Grade C

Evidence Summary

Evidence · Grade C

The current understanding of silica's efficacy is largely based on preliminary research, animal studies, and observational data. There is a lack of high-quality, randomized controlled trials in humans to definitively establish its health benefits for specific conditions.

Last reviewed · Jun 2026

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Why It Works

Silica is thought to influence osteoblast differentiation and activity, promoting the synthesis of collagen type I, a major organic component of bone. Additionally, it may contribute to the cross-linking of collagen fibers and the mineralization process by interacting with calcium and phosphorus.

How it works in more detail

The precise mechanisms by which silica exerts its biological effects are not fully elucidated. However, it is hypothesized that silicon plays a role in the initial stages of bone mineralization and collagen formation. It may act as a cross-linking agent for collagen and elastin fibers, contributing to the structural integrity and elasticity of connective tissues. Additionally, silicon is thought to influence the activity of enzymes involved in bone and cartilage metabolism. Its bioavailability and specific metabolic pathways within the human body are areas of continued research.

How to use

Always consult a qualified clinician.

Editorial guidance

Suggested dosage
Research suggests intake between 20-50 mg per day for bone health, often as a supplement containing bioavailable orthosilicic acid.
Typical forms
capsule, tablet, liquid
Quality markers
When purchasing silica supplements, look for products that specify the source (e.g., horsetail extract, orthosilicic acid) and provide information on the elemental silicon content. Reputable brands often conduct third-party testing for purity and potency.

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Suggested dosage

Research suggests intake between 20-50 mg per day for bone health, often as a supplement containing bioavailable orthosilicic acid.

General guidance — discuss specifics with a clinician.

Active medicinal compounds

Silicon (Si), often in the form of orthosilicic acid (OSA) or other bioavailable forms of silicon dioxide (SiO2).

Traditional use

Horsetail, a plant rich in silica, has been traditionally used in various folk medicine systems for its purported diuretic properties and to support bone, hair, and nail health. Its use dates back to ancient Roman and Greek times.

Safety

Safety warnings

Silica is generally considered safe when consumed in typical dietary amounts or as recommended in supplements. Excessive intake might lead to gastrointestinal upset, although this is rare.

General guidance — discuss specifics with a clinician.

Evidence ecosystem

Scientific literature, clinical guidance, government sources, ongoing research, traditional use, and lived experience — grouped by source type and quality.

Overall grade (C)

The current understanding of silica's efficacy is largely based on preliminary research, animal studies, and observational data. There is a lack of high-quality, randomized controlled trials in humans to definitively establish its health benefits for specific conditions.

Clinical Trial Registries(1)

Registered ongoing or completed trials (ClinicalTrials.gov).

Moderate Quality

Limitations: A significant limitation is the absence of robust human clinical trials. Many studies are small, lack control groups, or rely on indirect measures. The bioavailability of different forms of silica can also vary, complicating interpretation of results. Furthermore, establishing a clear dose-response relationship and long-term effects requires more dedicated research.

This page is educational. Statements use phrases like "may support" and "has been studied for"because no remedy here is approved to cure, treat, or reverse any condition. Discussion happens on the ailment pages — community statistics here are derived from those reports. Always consult a qualified clinician.

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