PoreIQIngredient compatibility
Can you use niacinamide and glycolic acid together?
Use with caution
Yes, but carefully. Niacinamide and glycolic acid can be combined, but the pairing raises the chance of irritation.
Why
They can be used together, but on sensitive skin the combination may cause temporary flushing.
How to use them
Use glycolic acid at night and niacinamide in the morning if you notice redness.
At a glance
Niacinamide
- What it does
- A gentle, multitasking form of vitamin B3 that supports the skin barrier, helps balance oil and evens out the look of tone.
- When to use
- AM/PM
- Main watch-out
- High concentrations (10% and up) can cause redness or tingling in some people
Glycolic Acid
- What it does
- The smallest alpha hydroxy acid. It dissolves the bonds between dead surface cells to reveal smoother, brighter-looking skin.
- When to use
- PM
- Main watch-out
- Stinging and redness, especially at higher strengths
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 niacinamide and glycolic acid together?
Yes, but carefully. Niacinamide and glycolic acid can be combined, but the pairing raises the chance of irritation. Use glycolic acid at night and niacinamide in the morning if you notice redness.
Which goes first, niacinamide or glycolic acid?
Use glycolic acid at night and niacinamide in the morning if you notice redness.
Related combinations
- Retinol and NiacinamideYesNiacinamide supports the skin barrier and is well tolerated, so it can help offset some of the dryness retinol causes.
- Retinol and Glycolic AcidKeep apartStacking an exfoliating acid with a retinoid is one of the most common causes of over-exfoliation.
- Vitamin C and NiacinamideYesAn old myth says they cancel each other out.
- Vitamin C and Glycolic AcidKeep apartTwo low-pH products in a row raise the chance of irritation, and vitamin C is best used in the morning anyway.
- Niacinamide and Salicylic AcidYesA popular combination for oily and acne-prone skin: salicylic acid clears pores, niacinamide helps with shine and the barrier.
- Niacinamide and Hyaluronic AcidYesBoth are gentle and suit all skin types.
- Niacinamide and Azelaic AcidYesA gentle combination for redness, breakouts and uneven tone.
- Niacinamide and Tranexamic AcidYesTwo gentle brighteners that are often formulated together.
Formulas differ: concentration, pH and your own skin all matter. This is general cosmetic information, not medical advice. Last updated 2026-10-22.