The role of lactic acid in facial skincare: properties, effects, and cosmetic formulations containing it
Tim Klein
2026-03-18
5 min. read
35
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Lactic acid, chemically referred to as 2-hydroxypropionic acid, represents a pivotal ingredient in numerous cosmetic formulations designed for facial care. Its multifaceted action extends beyond merely diminishing signs of skin aging to include modulation of the epidermal microbiome, gentle exfoliation of dead skin cells, and profound hydration of skin layers. In which specific products does this versatile compound appear, and which formulations should be selected to fully harness its beneficial properties?
Milk acids
It is obtained by the chemical synthesis of a cyclic additive soluble in water in an organic acid, containing asymmetric carbon atoms. It is therefore a chiral compound, occurring in two optically active varieties: enancomer D (D-) lactic acid or L (L) + lactic acids.
Milk acid in cosmetics
The cosmetic industry uses lactic acid because of its beneficial moisturizing, anti-aging, thickening and pH-regulating effects on the skin. Milk acid is one of the main components of the natural hydrating factor (NMF). It therefore affects the proper moisture sensation and hydration of the skin, maintaining a proper level of humidity in the skin.. In addition, it causes the production of collagen, thus improving the thickness and elasticity of skin..
Milk acid use
L-Lacetic Acid has found its use in acne cosmetics. It is used in both acne therapy and in the prevention of dandruff, rashes and inflammation of the skin. This application is due to its antibacterial effect on our skin. It helps to widen the skin's pores so that it can be cleaned.
Milk acid on the face
The use of lactic acid on the face carries a number of positive benefits. In beauty salons we can find a range of facial creams with its additive, which are readily available in pharmacies and pharmacies. They are especially recommended for people with sensitive and dry skin and a weakened protective barrier of the skin. Regular application makes the skin moist, soft, smooth and radiant. We can find in beauty parlors offers of skin treatments and cosmetics, such as peelings with the addition of fatty acid.