Ingredient comparison
Glycolic acid vs Lactic acid: which one is right for your skin?
Short answer: Both earn their place. Lactic acid is the kinder pick if your skin reacts easily, otherwise it comes down to preference.
| Compared | Glycolic acid | Lactic acid |
|---|---|---|
| Potency | Similar | Similar |
| Evidence | strong evidence | moderate evidence |
| Irritation risk | High | Moderate |
| Clogs pores | Low | Low |
| In pregnancy | Ask your doctor | Ask your doctor |
| pH-dependent | Needs the right pH | Needs the right pH |
So which should you pick?
Choose Glycolic acid if
- fine lines and firmness are your main goal
- you want the pick with the most research behind it
Choose Lactic acid if
- plump, dewy hydration is what you are after
- your skin is sensitive or reacts easily
The honest bottom line: Both earn their place. Lactic acid is the kinder pick if your skin reacts easily, otherwise it comes down to preference.
Better for your concern
- Fine lines and firmnessGlycolic acid
- Dryness and dehydrationLactic acid
- Sensitive, reactive skinLactic acid
Based on their scores in the knowledge base. "Either" means both hold their own for that goal.
Glycolic acid vs Lactic acid, answered
Which is stronger, Glycolic acid or Lactic acid?
They are close in strength: Glycolic acid and Lactic acid score similarly on efficacy. Choose by skin type rather than power.
Is Glycolic acid or Lactic acid better for sensitive skin?
Lactic acid is the gentler choice for sensitive, reactive skin (moderate irritation risk, versus high for Glycolic acid).
Can you use Glycolic acid and Lactic acid together?
They have a known interaction. See our can-you-mix page for the verdict and how to use them.
General guidance, not medical advice. Read the full pages on Glycolic acid and Lactic acid.