Mandelic Acid vs Glycolic Acid
Mandelic Acid vs Glycolic Acid — two alpha-hydroxy acids that exfoliate the skin's surface, differing mainly in molecule size: mandelic acid has a larger molecule that penetrates slowly and gently, while glycolic acid is the smallest AHA and works faster and more intensely. Mandelic acid is often chosen for sensitive or darker skin tones, whereas glycolic acid is valued for more pronounced resurfacing.
Key points
- Mandelic acid's larger molecular size means slower penetration and typically less irritation than glycolic acid.
- Glycolic acid delivers stronger exfoliation and is widely studied for fine lines, tone, and texture.
- Mandelic acid is often recommended for sensitive skin and for reducing the risk of post-inflammatory pigmentation.
- Both acids increase photosensitivity, so daily sunscreen use is advised during treatment.
Frequently asked
Is mandelic acid gentler than glycolic acid?
Yes, mandelic acid's larger molecule penetrates more slowly, so it is generally considered gentler and better tolerated by sensitive skin than glycolic acid.
Which acid is better for hyperpigmentation?
Both can help with uneven tone, but mandelic acid is often preferred for pigmentation, particularly on deeper skin tones, because it carries a lower risk of irritation-related discoloration.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
