A higher-strength 1% retinol treatment buffered with peptides, vitamin C and liquorice. A serious step-up retinol for experienced users targeting wrinkles and tone; introduce slowly and pair with barrier support.
The verdict
What this is good for
✓ Great forFine LinesPhotoaging PreventionRough Texture
The formulation
Ingredient stack
Each ingredient is listed in descending concentration. Above the 1% line the order is regulated — below it, brands can list in any order.
Ingredients above the dashed gold line are dosed above 1% (the regulatory threshold) — these are what the formulation is really built on. Percentages are positional estimates from INCI order unless a brand discloses them.
A vitamin A derivative converted in skin to retinoic acid. Increases cell turnover and stimulates collagen, improving fine lines, tone and texture. Introduce slowly to manage irritation; always pair with morning SPF.
An antioxidant that neutralises free radicals, supports collagen synthesis and brightens uneven tone. Most photoprotective when layered under sunscreen in the morning; stability varies by form.
The closest active-matched alternative is the Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum (77% active overlap). We found 6 options that share this product’s hero actives.
Skin Stacker is independent and receives no payment from any brand. Ingredient analysis is based on publicly disclosed INCI lists and the peer-reviewed literature. Percentages are positional estimates from INCI order unless a brand discloses them. Formulations change — always re-check the label on your specific batch before using.