Skip to main content

Bioavailability of silicon from food and food supplements


The bioavailability of silicon from three different silicon sources was studied. A diet rich in silicon, a tablet containing a dry extract of horsetail and a solution of silicon in a choline-glycerol matrix were compared. Blood and urine of one healthy test person were sampled to monitor the silicon uptake. The silicon content of blood and serum samples was determined by graphite furnace atomic absorption spectrometry. Strongly diverging results were obtained for the three different silicon sources. Neither an increase in urinary silicon excretion nor in serum silicon content was observed when feeding the silicon rich diet. Urinary silicon excretion did significantly (P < 0.05) rise during supplementation with tablets containing dry extract of horsetail. Intake of a solution of silicon in a choline-glycerol matrix resulted in a significantly (P < 0.05) increased urinary silicon excretion and serum silicon content. From these results it can be concluded that speciation (chemical form, matrix) strongly influences the bioavailability of silicon.

This is a preview of subscription content, access via your institution.

Author information

Authors and Affiliations


Additional information

Received: 3 August 1998 / Revised: 25 September 1998 / Accepted: 30 September 1998

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Van Dyck, K., Van Cauwenbergh, R., Robberecht, H. et al. Bioavailability of silicon from food and food supplements. Fresenius J Anal Chem 363, 541–544 (1999).

Download citation

  • Issue Date:

  • DOI:


  • Silicon
  • Furnace
  • Graphite
  • Serum Sample
  • Atomic Absorption