Minerals
Silica
Also called: silicon, orthosilicic acid, horsetail silica
A form of silicon, a trace element in bone and connective tissue.
- Why people take it
- Hair, skin, nails, bones.
- What the evidence says
- Very limited evidence.
- How it is usually taken
- Usually 5 to 20 mg of silicon a day (horsetail, bamboo extract or orthosilicic acid).
- Be careful
- Horsetail-based products can contain thiaminase and nicotine-like compounds; avoid long-term use.
- Medicines it can interact with
- No important medicine interactions are known, but tell your doctor and pharmacist about every supplement you take.
Other minerals
Common questions
What is Silica?
A form of silicon, a trace element in bone and connective tissue.
Why do people take Silica?
Hair, skin, nails, bones.
Does Silica work?
Very limited evidence.
How much Silica do people take?
Usually 5 to 20 mg of silicon a day (horsetail, bamboo extract or orthosilicic acid).
Is Silica safe?
Horsetail-based products can contain thiaminase and nicotine-like compounds; avoid long-term use.
Does Silica interact with medicines?
No important medicine interactions are known, but tell your doctor and pharmacist about every supplement you take.
Sources and further reading
Last reviewed 31 October 2026. Written by Satya Babu.
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