Glycolic Acid (AHA) + Sunscreen
Can you use Glycolic Acid with Sunscreen?
Yes. Sunscreen is the essential daytime partner for Glycolic Acid.
Why
In a controlled study, skin treated with glycolic acid for several weeks burned more easily under UV, and the effect faded about a week after stopping (Kaidbey et al., 2003). That is why daily broad-spectrum sunscreen is essential whenever you use an AHA.
How to use them together
- Apply Glycolic Acid as directed (if it is a night-time active, use it in the PM).
- In the morning, finish your routine with a broad-spectrum SPF 30 or higher as the last skincare step.
- Reapply every two hours when outdoors.
Who should be careful
Anyone using retinoids or acids should treat daily sunscreen as non-negotiable. If a sunscreen stings over freshly applied actives, wait a few minutes or switch to a mineral formula.
About the ingredients
Glycolic Acid (AHA): The smallest alpha hydroxy acid. A chemical exfoliant for texture and dullness. It can increase sun sensitivity.
Sunscreen: Broad-spectrum SPF 30+ protects against UV damage. It is the essential partner for retinoids, acids and brightening ingredients.
FAQ
Can I use Glycolic Acid and Sunscreen together?
Yes. Sunscreen is the essential daytime partner for Glycolic Acid.
Should I use Glycolic Acid or Sunscreen in the morning or at night?
Apply Glycolic Acid as directed (if it is a night-time active, use it in the PM). In the morning, finish your routine with a broad-spectrum SPF 30 or higher as the last skincare step.
Who should be careful combining Glycolic Acid and Sunscreen?
Anyone using retinoids or acids should treat daily sunscreen as non-negotiable. If a sunscreen stings over freshly applied actives, wait a few minutes or switch to a mineral formula.
Do I need sunscreen with Glycolic Acid and Sunscreen?
Yes. Daily broad-spectrum SPF 30+ is recommended with any active skincare routine.
Sources
Studies and reviews on these ingredients and, where available, on this specific combination.
- Kaidbey K, et al. Topical glycolic acid enhances photodamage by ultraviolet light. Photodermatol Photoimmunol Photomed. 2003;19(1):21-27.
- Kornhauser A, Coelho SG, Hearing VJ. Applications of hydroxy acids: classification, mechanisms, and photoactivity. Clin Cosmet Investig Dermatol. 2010;3:135-142.
- Sunscreens part 1: Mechanisms and efficacy. J Am Acad Dermatol. 2025.
Related combinations
- Can you use Retinol with Glycolic Acid?
- Can you use Retinol with Sunscreen?
- Can you use Vitamin C with Glycolic Acid?
- Can you use Vitamin C with Sunscreen?
- Can you use Niacinamide with Glycolic Acid?
- Can you use Niacinamide with Sunscreen?
- Can you use Tretinoin with Glycolic Acid?
- Can you use Tretinoin with Sunscreen?