The naturally occurring acidic amino acids in the skin constitute what is generally described as the “primary moisture retention factor of human skin”. In heavily oxidized, sun damaged skin, acidic amino acids are markedly decreased, and moisture retention is also significantly reduced. An independent, university study described that these acidic amino acids, the same ones that are used in AFA Gels, are capable of penetrating into the stratum granulosum and significantly increasing moisture retention by as much as three-fold. This logically accounts for the dramatic increase in moisture retention of the skin and would account for some of the decrease in visible lines seen with the use of the AFA Gels. Coupon valid for 2 weeks upon purchase date. The service will be walk-in only.