Evidence supporting the use of: Silicon
For the health condition: Hair Care (general)

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Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Silicon, particularly in the form of orthosilicic acid or as a component of certain dietary supplements (like choline-stabilized orthosilicic acid), has been scientifically investigated for its potential benefits in hair care. Silicon is a trace element naturally found in the body and is important for the synthesis of connective tissues, including hair, skin, and nails. Several studies suggest that silicon can improve hair strength, elasticity, and possibly growth. For example, a randomized, double-blind, placebo-controlled trial published in 2007 found that women who supplemented with choline-stabilized orthosilicic acid for nine months experienced significant improvements in hair tensile strength and thickness compared to placebo. The proposed mechanism is that silicon supports the structural integrity of hair by enhancing collagen synthesis and stabilization of glycosaminoglycans in the hair follicle. In cosmetic products, silicon-based compounds (like silicones, e.g., dimethicone) are widely used for their ability to coat the hair shaft, reducing frizz, improving shine, and providing a protective layer. While these effects are mostly cosmetic and do not influence hair health at a biological level, they are widely acknowledged in hair care science. Overall, there is moderate scientific evidence supporting silicon's role in improving hair strength and quality, mostly from supplementation studies. However, more research is needed to confirm long-term benefits and optimal dosing.

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