Glycolic Acid (AHA) + Lactic Acid (AHA)
Can you use Glycolic Acid with Lactic Acid?
Yes, with care. Glycolic Acid and Lactic Acid can be used in one routine, but avoid stacking them daily.
Why
Both are exfoliating acids. Combined products exist at balanced strengths, but layering separate acids can over-exfoliate, which shows up as stinging, redness and flaking.
How to use them together
- Choose one product that contains both, or alternate days.
- Start 2-3 times a week.
- Wear sunscreen every day; AHAs increase UV sensitivity.
Who should be careful
Sensitive skin, rosacea and eczema-prone skin should usually stick to one exfoliant.
About the ingredients
Glycolic Acid (AHA): The smallest alpha hydroxy acid. A chemical exfoliant for texture and dullness. It can increase sun sensitivity.
Lactic Acid (AHA): A gentler alpha hydroxy acid with a larger molecule than glycolic acid. Exfoliates and helps hydrate. Like all AHAs, it can increase sun sensitivity.
FAQ
Can I use Glycolic Acid and Lactic Acid together?
Yes, with care. Glycolic Acid and Lactic Acid can be used in one routine, but avoid stacking them daily.
Should I use Glycolic Acid or Lactic Acid in the morning or at night?
Choose one product that contains both, or alternate days. Start 2-3 times a week.
Who should be careful combining Glycolic Acid and Lactic Acid?
Sensitive skin, rosacea and eczema-prone skin should usually stick to one exfoliant.
What if my skin gets irritated using Glycolic Acid and Lactic Acid?
Stop the stronger active, keep a gentle cleanser, moisturizer and sunscreen, and reintroduce one product at a time once skin calms down. See a dermatologist if irritation persists.
Sources
Studies and reviews on these ingredients and, where available, on this specific combination.
- Kornhauser A, Coelho SG, Hearing VJ. Applications of hydroxy acids: classification, mechanisms, and photoactivity. Clin Cosmet Investig Dermatol. 2010;3:135-142.
- Kaidbey K, et al. Topical glycolic acid enhances photodamage by ultraviolet light. Photodermatol Photoimmunol Photomed. 2003;19(1):21-27.
Related combinations
- Can you use Retinol with Glycolic Acid?
- Can you use Vitamin C with Glycolic Acid?
- Can you use Niacinamide with Glycolic Acid?
- Can you use Tretinoin with Glycolic Acid?
- Can you use Glycolic Acid with Salicylic Acid?
- Can you use Glycolic Acid with Hyaluronic Acid?
- Can you use Retinol with Lactic Acid?
- Can you use Vitamin C with Lactic Acid?