1. Health
You can opt-out at any time. Please refer to our privacy policy for contact information.

Health Benefits of Orthosilicic Acid

What Should I Know About It?


Updated June 13, 2014

Written or reviewed by a board-certified physician. See About.com's Medical Review Board.

Orthosilicic acid is a substance found naturally in seawater, drinking water, and certain beverages (including beer). Sometimes referred to as "soluble silica," orthosilicic acid is a dietary form of silicon (a mineral involved in the formation of collagen and bone). Available in supplement form, orthosilicic acid is said to offer a number of health benefits.

Health Benefits of Orthosilicic Acid:

To date, very few studies have tested the health effects of orthosilicic acid. However, preliminary research shows that orthosilicic acid may offer certain health benefits. Here's a look at some key study findings:

1) Bone Health

Orthosilicic acid may help protect against loss of bone density, suggests a 2008 study from BMC Musculoskeletal Disorders. For the study, 136 women with osteopenia took calcium, vitamin D, and either orthosilicic acid or a placebo every day for a year. By the study's end, participants given the vitamins with orthosilicic acid showed greater improvements in bone formation. According to the study's authors, this finding indicates that orthosilicic acid shows promise as a treatment for osteoporosis.

In earlier studies on human cells, scientists discovered that orthosilicic acid may help promote bone formation by stimulating the production of collagen (a protein found in connective tissue, including bone) and promoting the development of bone-forming cells.

2) Joint Health

Orthosilicic acid is purported to improve joint health — and protect against conditions like osteoarthritis — by promoting collagen production in cartilage. Indeed, a 1997 study published in Biological Trace Element Research found that calves fed an orthosilicic-acid-supplemented diet experienced an increase in collagen concentration in their cartilage. However, it's not known whether orthosilicic acid supplementation might produce the same effect in humans and help shield joint health.

3) Hair

Orthosilicic acid may help improve hair, according to a small study published in Archives of Dermatological Research in 2007. For the study, 48 women with fine hair took either an orthosilicic acid supplement or a placebo every day for nine months. Results showed that orthosilicic acid appeared to boost hair strength and increase hair thickness, however, there haven't been any other studies examining the use of orthosilicic acid for hair.

Common Uses for Orthosilicic Acid:

Proponents claim that orthosilicic acid supplements can treat or prevent a wide range of health conditions, including:

  • Alzheimer's disease
  • arthritis
  • atherosclerosis
  • heart disease
  • high cholesterol
  • osteoporosis
  • stroke

In addition, orthosilicic acid is said to improve hair and nails, protect skin from the negative effects of aging, preserve dental health, and stimulate digestion.

Is Orthosilicic Acid Safe?

Although preliminary studies have not linked the use of orthosilicic acid with any adverse effects, little is known about the safety of taking orthosilicic acid supplements in the long term.

Where to Find Orthosilicic Acid:

Available for purchase online, orthosilicic acid supplements are sold in many natural-food stores and in stores specializing in dietary supplements.

Using Orthosilicic Acid for Health:

If you're considering the use of orthosilicic acid for a chronic condition, make sure to consult your physician before starting your supplement regimen. Self-treating a chronic condition with orthosilicic acid and avoiding or delaying standard care may have serious consequences.


Calomme MR, Vanden Berghe DA. "Supplementation of calves with stabilized orthosilicic acid. Effect on the Si, Ca, Mg, and P concentrations in serum and the collagen concentration in skin and cartilage." Biol Trace Elem Res. 1997 Feb;56(2):153-65.

Duivenvoorden WC, Middleton A, Kinrade SD. "Divergent effects of orthosilicic acid and dimethylsilanediol on cell survival and adhesion in human osteoblast-like cells." J Trace Elem Med Biol. 2008;22(3):215-23.

Reffitt DM, Ogston N, Jugdaohsingh R, Cheung HF, Evans BA, Thompson RP, Powell JJ, Hampson GN. "Orthosilicic acid stimulates collagen type 1 synthesis and osteoblastic differentiation in human osteoblast-like cells in vitro." Bone. 2003 Feb;32(2):127-35.

Spector TD, Calomme MR, Anderson SH, Clement G, Bevan L, Demeester N, Swaminathan R, Jugdaohsingh R, Berghe DA, Powell JJ. "Choline-stabilized orthosilicic acid supplementation as an adjunct to calcium/vitamin D3 stimulates markers of bone formation in osteopenic females: a randomized, placebo-controlled trial." BMC Musculoskelet Disord. 2008 Jun 11;9:85.

Wickett RR, Kossmann E, Barel A, Demeester N, Clarys P, Vanden Berghe D, Calomme M. "Effect of oral intake of choline-stabilized orthosilicic acid on hair tensile strength and morphology in women with fine hair." Arch Dermatol Res. 2007 Dec;299(10):499-505.

  1. About.com
  2. Health
  3. Alternative Medicine
  4. Supplements
  5. Health Benefits of Orthosilicic Acid

©2014 About.com. All rights reserved.

We comply with the HONcode standard
for trustworthy health
information: verify here.