What it does
The gentlest common alpha hydroxy acid, with a large molecule that exfoliates slowly to smooth texture, clear breakouts, and even the look of tone with minimal irritation.
Best for
Sensitive, acne-prone, or deeper skin tones that want gentle exfoliation and brightening. The mildest AHA option.
What is mandelic acid?
Mandelic acid is the gentlest common alpha hydroxy acid, derived from bitter almonds. Its large molecule penetrates slowly, so it exfoliates the skin surface with far less irritation than glycolic or lactic acid.
That mildness, plus mild antibacterial activity, makes it a strong pick for sensitive and acne-prone skin.
What does mandelic acid do for skin?
Mandelic acid gently smooths texture, helps clear breakouts, and evens the look of tone.
Alpha hydroxy acids exfoliate the surface and improve the appearance of texture, and mandelic acid is the slowest, gentlest of the group.
It is milder than glycolic acid and even lactic acid, so it suits reactive skin and deeper skin tones prone to post-inflammatory marks. Use it at night and follow with morning sunscreen.
Who should use mandelic acid?
Mandelic acid suits sensitive, acne-prone, or easily-marked skin that finds other acids too harsh. If you want maximum resurfacing and your skin tolerates it, glycolic acid is stronger.
Evidence
Alpha hydroxy acids exfoliate the surface and improve the appearance of texture; mandelic acid's larger molecule makes it the slowest and gentlest of the group.
Read the source: Molecules: Dual Effects of Alpha-Hydroxy Acids on the Skin (2018) ->