We have changed the form of silicon that we use both in our pure silica product (now called Biosilica) and any of our multiple formulae that contain silicon.
Metabolics uses a bioavailable form of silica (as choline-stabilised orthosilicic acid) which has a 17% absorption rate compared to silica dioxide which is less than 1%.
As a major trace element, the human body contains 1-2 gm of silica. It also diminishes as we age, although we ingest 20-50 mg per day. Food sources of silica are whole grains and cereals, beer and green beans.
It has been suggested that decreased steroid or thyroid hormones decreases silica absorption. Although post menopausal women absorb silica less easily, it is still excreted in the same amount as calcium. Silicon is 25 times more concentrated in bone forming protein than in mature bone. It appears to act as a catalyst to make the bone calcify and then leaves so there is no harmful build up.
Silica is also present in the hair at 1-10ppm, (Wicket et al 2007).
Accumulated evidence over the last 30 years suggests an important role in bone formation and bone and connective tissue health. Mechanisms are unclear but evidence exists of its involvement in collagen synthesis and/or its stabilization and in matrix mineralization (Jugdaohsingh, 2007). Researchers found that short term supplementation with silicon improved Bone mineral density in osteoporosis in animals (Bae et al 2008).
Bae, Y. J., Kim, J. Y., Choi, M. K., Chung, Y. S., & Kim, M. H. (2008). Short-term administration of water-soluble silicon improves mineral density of the femur and tibia in ovariectomized rats. Biological trace element research,124(2), 157-163.
Jugdaohsingh, R. (2007). Silicon and bone health. The journal of nutrition, health & aging, 11(2), 99.
Wickett, R. R., Kossmann, E., Barel, A., Demeester, N., Clarys, P., Berghe, D. V., & Calomme, M. (2007). Effect of oral intake of choline-stabilized orthosilicic acid on hair tensile strength and morphology in women with fine hair. Archives of dermatological research, 299(10), 499-505.
Orthosilicic Acid, Choline Chloride, Hydroxypropyl Methylcellulose (capsule).