hydroxy acid


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hydroxy acid

[hī′dräk·sē ′as·əd]
(organic chemistry)
Any organic acid, with an OH- group, such as hydroxyacetic acid.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Alpha hydroxy acids such as lactic acid improves melasma by inhibiting tyrosinase enzyme directly therefore suppressing melanin formation.25 It also increases keratinocyte turnover and decrease corneocyte cohesion thereby decreasing stratum corneum thickness which hastens the resolution of melasma.25 This study was undertaken to determine the efficacy of lactic acid peeling in melasma.
"It's an alpha hydroxy acid and it's a good pick even for sensitive skin as it tends to be less irritating.
-- Cosmetic products containing alpha hydroxy acids should include labeling that warns the products can make the skin more sensitive to the sun and increase the risk of sunburn, the Food and Drug Administration has proposed.
Double-digit growth (albeit from a low base) is also projected for enzymes and newer plant acids, such as beta hydroxy acid. The use of fruit-derived enzymes, such as papain (made from papayas) and bromelain (from pineapples), has expanded beyond traditional applications in meat tenderizing, septic tank cleaning, beer brewing, and leather tanning, to include their addition to health drinks, dietary supplements, contact-lens cleaning solutions, skin cleansers, and toothpaste.
The third step in the pathway is a caste-specific oxidation of the major hydroxy acid. Queens oxidize their 9-hydroxy acid to the corresponding keto acid, a step normally not detected in workers.
Salicylic acid is sometimes referred to as a beta hydroxy acid, and is often combined in glycolic acid-based oily- or acne-prone skin care products.
It's an solution that contains either an Alpha Hydroxy Acid (AHA) or Beta Hydroxy Acid (BHA), or a blend of both.
Look for products that contain alpha hydroxy acid and vitamin A.
Beauty ed says: Made up of 87% natural ingredients, this mask has 10% AHA (alpha hydroxy acid) - which is the highest concentration you can get on the home market - to peel away dead, dull skin.
Beta hydroxy acid and a peptide that is based on the skin's natural defense system work synergistically to provide gentle, yet effective action.
"Select a cleanser with ingredients such as salicylic acid or alpha hydroxy acid to unplug debris from pores," she tells us.