BioSil is a stabilized, concentrated Orthosilicic Acid. The body absorbs silicon only in the form of Orthosilicic Acid: a dissolved form of silicon that consists of a single molecule or monomer. Orthosolicic Acid is produced in small amounts in the stomach from dietary silicon. Only biosil contains a highly potent 2% solution of stabilized, biologically active Orthosilicic Acid. Horsetail, algae and polymerized silicic acid have a relatively poor rate of conversion to Orthosilicic Acid and, thus, are not well absorbed. Silicon is an essential mineral required for the strength and elasticity of bones, joints, connective tissue, hair, skin, nails, mucous membranes and arteries. BioSil is for Bone Formation, Joint Function, Collagen Formation Hair, Bone Formation, Skin And Nails. Ingredients/Supplement Fact Gelatin. Suggested Use/Direction As directed by your doctor / physician