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Which type of peel causes the coagulation of protein in the skin, resulting in a frosted appearance?

  1. Glycolic

  2. TCA and Jessner

  3. Salicylic

  4. Lactic

The correct answer is: TCA and Jessner

The type of peel that causes the coagulation of protein in the skin, leading to a frosted appearance, is TCA (Trichloroacetic Acid) and Jessner peels. These peels are classified as medium-depth peels, which means they penetrate deeper into the skin layers compared to superficial peels like glycolic, salicylic, or lactic acid. The frosted appearance occurs because these peels cause significant changes in the skin, including the denaturation of proteins. This process is essential for promoting the shedding of damaged skin and stimulating new skin growth, which can improve the appearance of fine lines, wrinkles, and other skin imperfections. Glycolic and salicylic peels are typically superficial and do not penetrate deeply enough to cause coagulation at that level. Lactic acid, a milder alpha-hydroxy acid, also does not have enough strength to achieve this effect. Thus, the unique characteristics of TCA and Jessner peels make them suitable for creating the frosted effect by reaching deeper layers of the skin, facilitating significant skin rejuvenation.