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Formula Anatomy Deciphered: Temporary Hair Depilation
By: Eric S. Abrutyn, TPC2 Advisors Ltd., Inc.
Posted: December 29, 2010, from the January 2011 issue of Cosmetics & Toiletries.
- Figure 1. The breakage of the disulfide bridges of keratin allows for the formation of new disulfide bonds.
- Figure 2. Thioglycolic acid
- Figure 3. X-Epil Extra Sensitive Depilation Cream
- Figure 4. Veet Hair Removal Mousse
- Figure 5. Yves Rocher Aloe Vera Essentiel Cold Wax Strips:
- Figure 6. Auchan Depil Mousse Piels Sensibles (Hair Removing Mousse for Sensitive Skin)
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As noted, although depilatory hair removal has stayed relatively consistent, the current trends are to develop more naturally based depilatories or those that remove hair as well as affect the hair growth cycle. The challenge of developing natural depilatories is that hair removal by chemical action requires high-pH ingredients and these are not easily found in nature, or they often do not have comprehensive safety substantiation. For the most part, natural claims are associated with the use of botanical ingredients or those not directly associated with depilation action. A good example is Zingiber officinale (ginger) root extract, which can minimize hair growth and thus reduce the frequency of shaving required.
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1. US Patent Application 20,090,005,462, Structured depilatory compositions, ET Gunn and MR Tyerech (Jan 1, 2009)
2. US Patent 7,468,421, Depilatories and agents for external use, A Ohuchi, A Kobayashi and A Hachiya, assigned to Kao Corp. (Dec 23, 2008)
3. US Patent Application 20,090,004,128, Non-irritant rapid-action depilatory composition, M Flork (Jan 1, 2009)
4. US Patent Application 20,100,021,412, Reduction of hair growth, CS Hwang (Jan 28, 2010)