How to use them
Split them up: use Vitamin C in your morning routine (under sunscreen) and Lactic Acid at night.
- 1CleanseGentle cleanser, pat dry
- AMVitamin Cthen moisturiser and SPF 50
- PMLactic Acidthen moisturiser
What Lactic Acid does
A gentler AHA with a larger molecule. It exfoliates while also acting as a humectant, so it suits dry and sensitive skin that cannot tolerate glycolic acid.
- Typical strength
- 5% – 10%
- When
- PM
- Irritation
- Best for
- Dry, Normal And Sensitive skin
Everything that pairs with Lactic Acid →
What Vitamin C does
A powerful antioxidant that brightens dull skin, fades dark spots and boosts your sunscreen's protection against free radicals. Pure L-ascorbic acid works best at a low pH and oxidises (turns orange) quickly.
- Typical strength
- 10% – 20%
- When
- AM
- Irritation
- Best for
- Normal, Oily, Combination And Dry skin
Everything that pairs with Vitamin C →
Trying to choose one? Read Lactic Acid vs Vitamin C: which is better for your skin.
Frequently asked questions
Can I use Lactic Acid and Vitamin C together?
Yes, but not at the same time. Pure vitamin C is already acidic. Layering Lactic Acid on top lowers the pH further and raises the risk of stinging and irritation. Use vitamin C in the morning and Lactic Acid at night.
Which goes first, Lactic Acid or Vitamin C?
Apply Vitamin C first, then Lactic Acid. The general rule is thinnest to thickest texture, and lowest pH first. For this pair, though, it is better not to layer them in the same routine at all.
Should I use Lactic Acid in the morning or at night?
Lactic Acid: best at night. Use 2–3 nights a week. It is good for beginners to exfoliation. Follow with a moisturiser, and wear SPF the next day.
Should I use Vitamin C in the morning or at night?
Vitamin C: best in the morning. Apply in the morning on clean skin before moisturiser and sunscreen. Store it away from light and heat, and throw it out once it turns dark orange.