How to use them
Alternate nights, for example Lactic Acid on Monday, Wednesday and Friday and Peptides 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 Peptides.
- 1CleanseGentle cleanser, pat dry
- AMLactic Acid (day 1)then moisturiser and SPF 50
- PMPeptides (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 Peptides does
Short chains of amino acids that signal skin to support collagen and repair. They are gentle, a good anti-ageing option for people who cannot tolerate retinoids, and they layer easily.
- Typical strength
- varies
- When
- AM/PM
- Irritation
- Best for
- Dry, Normal, Sensitive And Combination skin
Everything that pairs with Peptides →
Frequently asked questions
Can I use Lactic Acid and Peptides together?
Yes, but not at the same time. Low-pH acids can break down peptides, and with copper they can also irritate. Use the acid at one time of day and the peptide at the other, or on alternate nights.
Which goes first, Lactic Acid or Peptides?
Apply Lactic Acid first, then Peptides. 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 Peptides in the morning or at night?
Peptides: works morning or night. Use morning and night after water-based serums. Low-pH acids applied at the same time can break some peptides down.