Silicon

What does it do? Silicon is a trace mineral. The functions of silicon are not well understood, although silicon probably plays a role in making and maintaining connective tissue. Silicon is present in areas of bone that are undergoing mineralization, which indicates this mineral might be important for normal bone function; however, evidence for this has not been confirmed in humans.1

Where is it found? Good dietary sources for silicon include whole-grain breads and cereals, root vegetables, and beer. A form of silicon called silicates is added to some processed foods.

Silicon has been used in connection with the following condition (refer to the individual health concern for complete information):

Rating Health Concerns
1Star Osteoporosis
Sprains and strains
3Stars Reliable and relatively consistent scientific data showing a substantial health benefit.
2Stars Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit.
1Star An herb is primarily supported by traditional use, or the herb or supplement has little scientific support and/or minimal health benefit.

Who is likely to be deficient? Silicon is not an essential mineral. Deficiencies have not been reported.

How much is usually taken? Because silicon has not been established as essential, a recommended intake has not been established. The average diet is estimated to provide 5–20 mg of silicon per day—an amount that appears adequate. When used as a supplement, common amounts range from 1 to 2 mg per day.

Are there any side effects or interactions? A high dietary intake of silicon is not associated with any toxic effects. Inhalation of large amounts of silicon (in an industrial setting) can cause the respiratory disease silicosis.

At the time of writing, there were no well-known drug interactions with silicon.

References:

1. Nielsen FH. How should dietary guidance be given for mineral elements with beneficial actions or suspected of being essential? J Nutr 1996;126:S2377–85 [review].