How to use them
Use them in the same routine at night. Apply Polyglutamic Acid first, then Retinal, moving from thinnest to thickest texture.
- 1CleanseGentle cleanser, pat dry
- 2Polyglutamic Acid1% – 3%, wait about 1 minute
- 3Retinal0.05% – 0.2%
- 4Moisturiserseal everything in
What Polyglutamic Acid does
A bigger-molecule humectant that forms a moisture-holding film on the skin. It is often paired with hyaluronic acid for plump, long-lasting hydration.
- Typical strength
- 1% – 3%
- When
- AM/PM
- Irritation
- Best for
- Dry, Normal, Combination, Sensitive And Oily skin
Everything that pairs with Polyglutamic 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 →
Frequently asked questions
Can I use Polyglutamic Acid and Retinal together?
Yes, and they work even better together. Polyglutamic Acid cushions Retinal: it hydrates and supports the barrier while the active does its work. That means less irritation and better results.
Which goes first, Polyglutamic Acid or Retinal?
Apply Polyglutamic Acid first, then Retinal. The general rule is thinnest to thickest texture, and lowest pH first.
Should I use Polyglutamic Acid in the morning or at night?
Polyglutamic Acid: works morning or night. Apply after toner and before moisturiser, morning or night.
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 Polyglutamic 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.