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

Mandelic Acid – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Mandelic Acid ($C_{8}H_{8}O_{3}$) is an aromatic Alpha Hydroxy Acid (AHA) characterized by its significantly larger molecular structure compared to its peers. While Glycolic Acid has two carbons, Mandelic Acid features an eight-carbon aromatic ring. This increased molecular weight (approximately 152 g/mol) is the secret to its "gentle" reputation. It physically cannot travel through the skin's lipid layers as quickly as smaller acids, ensuring that exfoliation remains uniform and surface-level. Furthermore, Mandelic Acid is unique among AHAs for its lipophilic (oil-seeking) nature, allowing it to penetrate oily pores more effectively than Glycolic or Lactic acid, which are strictly hydrophilic.

Ingredient Encyclopedia

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

by ThankMeNow Editors on Sep 10, 2025
Mandelic acid is a gentle alpha hydroxy acid (AHA) derived from bitter almonds. Its larger molecular size makes it slower to penetrate the skin, which reduces irritation compared to glycolic acid while still promoting exfoliation and brighter, more even skin tone. This guide explains what mandelic acid does, who it suits, how to use it safely, and potential side effects.