What it is
Retinal, also called retinaldehyde, is the aldehyde form in the vitamin A family and sits between retinol and retinoic acid in the conversion pathway. In cosmetics it is used as a skin-conditioning and antioxidant ingredient and is sensitive to light and air, which makes formulation and packaging important for stability. It is not a UV filter.
Safety & warnings
As a vitamin A derivative, retinal can cause dryness, redness, or irritation for some users, particularly when first introduced or at higher levels, and gradual acclimation is commonly advised. It is light- and air-sensitive. Those who are pregnant or nursing often choose to consult a clinician before using topical retinoids.
Origin & sourcing
A vitamin A derivative; the cosmetic ingredient is typically produced synthetically.
Questions everyone asks
How is retinal different from retinol?
Retinal is the aldehyde form of vitamin A, one step closer to the active form than retinol in the skin's conversion pathway.
Can it be used with sunscreen?
Yes; it is often paired with daytime sun protection, and the sunscreen's filters, not the retinal, provide UV protection.