Mandelic acid is an alpha-hydroxy acid derived from bitter almonds with a relatively large molecular size, allowing slower, gentler skin penetration. It is used to exfoliate, improve skin texture and tone, address hyperpigmentation, and manage acne.
| Reported effect | How often | Notes |
|---|---|---|
Mild stinging or tingling on application | Common | Usually transient and subsides shortly after application. |
Erythema (redness) | Common | Generally mild and temporary, especially with higher concentrations or peels. |
Dryness or flaking | Common | Result of increased cell turnover; often improves with moisturization. |
Increased photosensitivity | Common | AHAs raise sun sensitivity; daily sunscreen is recommended. |
Itching or irritation | Uncommon | More likely with sensitive skin or overuse. |
Post-inflammatory hyperpigmentation | Rare | Generally lower risk than stronger AHAs, but possible in darker skin tones with irritation. |
Allergic contact dermatitis | Rare | Hypersensitivity reactions are uncommon but reported. |
Chemical burn or blistering | Very rare | Associated with high concentrations, prolonged contact, or improper use. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.