Education · 6 min read
Retinol, retinal and tretinoin: what's the difference?
A clear guide to the vitamin A family and how to start safely.
The family
Retinol and retinaldehyde are cosmetic forms that convert to retinoic acid in the skin. Tretinoin is retinoic acid itself and is prescription-only in Switzerland.
What they do
Retinoids increase cell turnover and support collagen, helping with fine lines, texture and acne.
Starting slowly
Begin two or three nights a week and build up. Dryness and flaking are common at first. Use sunscreen daily.
When to avoid
Retinoids are generally avoided during pregnancy and breastfeeding. Ask a doctor if unsure.