PoreIQIngredient compatibility
Can you use retinol and lactic acid together?
Use at different times
Usually not in the same routine. Most people get better results using retinol and lactic acid at different times.
Why
Lactic acid is gentler than glycolic, but combined with retinol it can still overwhelm the skin.
How to use them
Alternate nights and watch for tightness or stinging.
At a glance
Retinol
- What it does
- A vitamin A derivative that speeds up skin cell turnover. It is one of the most studied ingredients for texture, fine lines and clogged pores.
- When to use
- PM
- Main watch-out
- Dryness, flaking and stinging are common in the first weeks ("retinization")
Lactic Acid
- What it does
- A gentler alpha hydroxy acid that exfoliates while also helping the skin hold on to water.
- When to use
- PM
- Main watch-out
- Still increases sun sensitivity
General layering tips
- Introduce one new active at a time and give it 2–4 weeks.
- Patch test new products on a small area for a few days.
- If your skin stings, burns or peels, stop the newest product and simplify.
- Wear broad-spectrum SPF 30+ daily when using retinoids or acids (AAD sunscreen guidance).
Frequently asked questions
Can you use retinol and lactic acid together?
Usually not in the same routine. Most people get better results using retinol and lactic acid at different times. Alternate nights and watch for tightness or stinging.
Which goes first, retinol or lactic acid?
Alternate nights and watch for tightness or stinging.
Related combinations
- Retinol and Vitamin CKeep apartBoth are strong, and using them back-to-back increases the chance of irritation.
- Retinol and NiacinamideYesNiacinamide supports the skin barrier and is well tolerated, so it can help offset some of the dryness retinol causes.
- Retinol and Hyaluronic AcidYesHyaluronic acid only hydrates.
- Retinol and Salicylic AcidKeep apartBoth increase cell turnover and can dry the skin.
- Retinol and Glycolic AcidKeep apartStacking an exfoliating acid with a retinoid is one of the most common causes of over-exfoliation.
- Retinol and Benzoyl PeroxideKeep apartBenzoyl peroxide can break down some retinoids, and both are drying.
- Retinol and CeramidesYesCeramides help rebuild the barrier that retinol can stress.
- Retinol and PeptidesYesPeptides are gentle and do not interfere with retinol.
Formulas differ: concentration, pH and your own skin all matter. This is general cosmetic information, not medical advice. Last updated 2026-10-22.