How to use them
Alternate nights, for example Lactic Acid on Monday, Wednesday and Friday and Mandelic Acid on Tuesday and Thursday, with a plain moisturiser night in between if your skin feels sensitive. If your skin is resilient and already used to both, you can try layering them: apply Lactic Acid first, wait a few minutes, then apply Mandelic Acid.
- 1CleanseGentle cleanser, pat dry
- AMLactic Acid (day 1)then moisturiser and SPF 50
- PMMandelic Acid (day 2)then 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 Mandelic Acid does
The largest, slowest AHA. Dermatologists often pick it for melanin-rich Indian skin tones because it treats acne and pigmentation with a lower risk of post-inflammatory darkening.
- Typical strength
- 5% – 10%
- When
- PM
- Irritation
- Best for
- Sensitive, Oily And Combination skin
Everything that pairs with Mandelic Acid →
Trying to choose one? Read Lactic Acid vs Mandelic Acid: which is better for your skin.
Frequently asked questions
Can I use Lactic Acid and Mandelic Acid together?
Yes, but not at the same time. Lactic Acid and Mandelic Acid are both exfoliating acids. Layered together they can over-exfoliate, which shows up as stinging, shiny tight skin and breakouts. Pre-formulated blends are fine. Otherwise, use them on different nights.
Which goes first, Lactic Acid or Mandelic Acid?
Apply Lactic Acid first, then Mandelic 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 Mandelic Acid in the morning or at night?
Mandelic Acid: best at night. Use 3–4 nights a week. It is mild enough that many people can use it more often than other acids.