Glycolic Acid
The smallest alpha-hydroxy acid (AHA), widely used in superficial chemical peels and cosmeceutical formulations to exfoliate the stratum corneum and improve skin texture.
Full Definition
Glycolic acid is derived from sugarcane and is the most commonly used alpha-hydroxy acid in cosmetic dermatology. Its small molecular size allows for relatively deep penetration compared with other AHAs, making it effective for exfoliation, pigmentation correction, and collagen stimulation at clinical concentrations (20–70%). Editors should note it is always two words and lowercase unless beginning a sentence. It should not be conflated with salicylic acid, which is a beta-hydroxy acid with different indications. In ingredient lists, the INCI name 'glycolic acid' is always lowercase.
Usage
Usage note: Always lowercase in running text. Do not abbreviate to 'GA' without definition. Distinguish clearly from salicylic acid (beta-hydroxy acid) in any editorial context.
In Context
- "A 30% glycolic acid peel was applied for two minutes before neutralisation with sodium bicarbonate solution." — Clinical procedure note
- "When editing product ingredient lists, ensure 'glycolic acid' appears in lowercase per INCI convention." — Marketing copy editorial note