AHA
AHAs, or alpha hydroxy acids, are a family of gentle exfoliating acids commonly used in UK skincare to help reveal smoother, brighter skin. Found in many cleansers, toners, serums and peels, they work by loosening the bonds between dead skin cells so they can be shed more easily. Popular examples include glycolic acid, lactic acid and mandelic acid.
How it works in skincare
In cosmetics and skincare AHAs function as chemical exfoliants that weaken the intercellular glue holding together the outermost layer of dead skin cells. This promotes natural cell turnover, resulting in a smoother texture, improved radiance and better absorption of other skincare ingredients. They are widely formulated into daily and weekly products at varying strengths for both leave-on and rinse-off use.
Key benefits
- Gently exfoliates the skin’s surface
- Improves skin brightness and radiance
- Helps reduce the appearance of dullness
- Smooths rough or uneven texture
- Enhances absorption of other skincare products
- Can minimise the look of fine lines over time
Best for
dull skin, mature skin, dry skin, combination skin, uneven texture
Where it comes from
AHAs are naturally derived from plant sources such as sugar cane (glycolic acid), sour milk (lactic acid), almonds (mandelic acid) and fruits like apples and grapes.