How to use them
Use them in the same routine at night. Apply Kojic Acid first, then Retinal, moving from thinnest to thickest texture.
- 1CleanseGentle cleanser, pat dry
- 2Kojic Acid1% – 2%, wait about 1 minute
- 3Retinal0.05% – 0.2%
- 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 Retinal does
Retinaldehyde is one conversion step closer to retinoic acid than retinol, so it works faster than retinol while usually being gentler than tretinoin. It also has a mild antibacterial effect useful for acne.
- Typical strength
- 0.05% – 0.2%
- When
- PM
- Irritation
- Best for
- Normal, Oily, Combination And Dry skin
Everything that pairs with Retinal →
Trying to choose one? Read Kojic Acid vs Retinal: which is better for your skin.
Frequently asked questions
Can I use Kojic Acid and Retinal together?
Yes, it is safe. There is no known chemical conflict between Kojic Acid and Retinal, and neither makes the other less effective. They share a goal (pigmentation), so together they reinforce each other.
Which goes first, Kojic Acid or Retinal?
Apply Kojic Acid first, then Retinal. 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 Retinal in the morning or at night?
Retinal: best at night. Start at 0.05% two or three nights a week and build up slowly. Buffer with moisturiser if you are sensitive, and wear SPF daily.
Is Kojic Acid with Retinal safe during pregnancy?
Retinal is generally avoided during pregnancy and breastfeeding. Ask your doctor about safer alternatives such as azelaic acid or bakuchiol.