Ingredient
Glycolic acid
Also called: AHA, Alpha hydroxy acid
The strongest common AHA for dullness, texture, superficial pigment, and fine surface lines.
Sharon’s verdict
Worth it
What Sharon would tell you
Glycolic acid is the smallest common AHA, which means it penetrates more deeply and can be more potent. That makes it useful, and also easier to overdo.
Use it for surface concerns, not as a daily punishment for your face. Alternate with retinoids instead of stacking them in the same routine.