RDA is unknown; estimates vary widely.
Silicon is a mineral and is not the same as the silicone used in industry and in breast implants.
Silicon is found in trace amounts everywhere in the body, especially the hair, nails and skin, where it strengthens and keeps cells supple. It also keeps bones, cartilage, tendons and artery walls strong.
Where do you get silicon?
It is in plant fibres, especially whole grains such as wheat, oats, barley and rice. It is also in onions and beetroot.
Too little silicon
Not much is known about lack of silicon, but it may be a factor in increased risk of cardiovascular disease and a lack of stamina.
Silicon is available in supplements but its usefulness is open to question.
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The material is for general information only and does not constitute investment, tax, legal, medical or other form of advice. You should not rely on this information to make (or refrain from making) any decisions. Always obtain independent, professional advice for your own particular situation.