Silica applied topically in the form of a gel, would appear to provide a significant benefit to those with acne. Due to the molecular properties of silica and its large surface area, it draws out and binds to impurities, bacteria and lipids such as sebum. The lowering of sebum is particularly important because it has been shown to play a highly significant role in the acne process.
A study by Lassus (1996) split 30 acne patients into two groups, 15 patients were treated with topical silicol gel for 20 minutes twice daily, and the other 15 were treated with a placebo gel (no active ingredients). The study lasted 6 weeks. The two groups were compared in terms of the number of spots and the level of sebum production. Compared to the placebo group, those using silicol gel showed a highly significant drop in spots of all kinds, and a significant drop in sebum levels.
A field survey in the UK using questionnaires reported significant improvements by those who used silicol gel. After 6 weeks of using this gel an 86% overall improvement was reported.
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Acne Support Group. The effects of Silicol Skin on moderate to severe acne: UK field survey. Adv Ther. 2001 Mar-Apr;18(2):93-9.
Lassus A (1996). The effect of silicol gel compared with placebo on papulopustular acne and sebum production. A double-blind study. J Int Med Res. 1996 Jul-Aug;24(4):340-4.