How to use them
Use them in the same routine at night. Apply Kojic Acid first, then Tretinoin, moving from thinnest to thickest texture.
- 1CleanseGentle cleanser, pat dry
- 2Kojic Acid1% – 2%, wait about 1 minute
- 3Tretinoin0.025% – 0.1% (prescription)
- 4Moisturiserseal everything in
What Kojic Acid does
Derived from fungi used in rice wine and soy sauce production, kojic acid blocks the enzyme that makes melanin. It is effective on dark spots but can cause contact sensitivity in some people.
- Typical strength
- 1% – 2%
- When
- AM/PM
- Irritation
- Best for
- Normal, Oily And Combination skin
Everything that pairs with Kojic Acid →
What Tretinoin does
The prescription-strength retinoid, and the gold standard for acne and photo-ageing, with decades of evidence. It works directly (no conversion needed), so it is stronger and more irritating than retinol or retinal.
- Typical strength
- 0.025% – 0.1% (prescription)
- When
- PM
- Irritation
- Best for
- Oily, Normal And Combination skin
Everything that pairs with Tretinoin →
Trying to choose one? Read Kojic Acid vs Tretinoin: which is better for your skin.
Frequently asked questions
Can I use Kojic Acid and Tretinoin together?
Yes, it is safe. There is no known chemical conflict between Kojic Acid and Tretinoin, and neither makes the other less effective. They share a goal (pigmentation), so together they reinforce each other.
Which goes first, Kojic Acid or Tretinoin?
Apply Kojic Acid first, then Tretinoin. The general rule is thinnest to thickest texture, and lowest pH first.
Should I use Kojic Acid in the morning or at night?
Kojic Acid: works morning or night. Patch test first. Use once daily at first, then build up.
Should I use Tretinoin in the morning or at night?
Tretinoin: best at night. Use only as prescribed: a pea-sized amount on completely dry skin at night, starting 2–3 nights a week. Expect dryness and a possible purge for 4–8 weeks. Daily SPF is essential.
Is Kojic Acid with Tretinoin safe during pregnancy?
Tretinoin is generally avoided during pregnancy and breastfeeding. Ask your doctor about safer alternatives such as azelaic acid or bakuchiol.