Ingredient Encyclopedia

Welcome to the Ingredient Encyclopedia

Discover what’s inside your skincare — from retinol to aloe vera — with clear guides on benefits, uses, and safety.

Ingredient Encyclopedia

Glycolic Acid – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Glycolic Acid ($C_{2}H_{4}O_{3}$) is the simplest and smallest Alpha Hydroxy Acid (AHA). Its molecular weight is approximately 76 g/mol, making it significantly smaller than Lactic (90 g/mol) or Mandelic (152 g/mol) acids. This tiny size allows it to penetrate the skin's surface more deeply and rapidly than any other AHA. Once absorbed, it works by thinning the stratum corneum and stimulating the production of new collagen and glycosaminoglycans in the dermis. Because it is highly hydrophilic (water-loving), it is exceptionally effective at breaking down the ionic bonds—often called "cellular glue"—between keratinocytes, resulting in rapid exfoliation and a signature "glass skin" glow.

Ingredient Encyclopedia

Glycolic Acid (AHA) – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Glycolic acid is one of the most popular alpha hydroxy acids (AHAs) used in skincare. Known for its ability to exfoliate the skin’s surface, glycolic acid helps to reveal smoother texture, boost radiance, and fade uneven pigmentation. This guide explains what glycolic acid does, who it suits, possible side effects, and how to safely add it to your skincare routine.