Lactic acid, a type of alpha hydroxy acid (AHA), is derived from milk and is known for its gentle exfoliating properties. In Korean skincare, lactic acid is a favorite for those looking to improve skin texture, brighten their complexion, and promote smooth, radiant skin without causing excessive irritation.

Benefits of Lactic Acid: Works by gently exfoliating the skin’s surface, helping to slough off dead skin cells and reveal fresher, more even-toned skin underneath. Its mild nature makes it suitable for sensitive skin, while still delivering powerful results. In addition to exfoliating, lactic acid is also a humectant, meaning it helps draw moisture into the skin, keeping it hydrated and plump. Over time, regular use can improve skin texture, reduce the appearance of fine lines, and brighten dull skin.

Ingredients That Work Well with Lactic Acid: Works well with hydrating ingredients like hyaluronic acid and glycerin to maintain moisture balance while exfoliating. It also pairs well with niacinamide and peptides, which help calm and strengthen the skin barrier after exfoliation, making lactic acid an ideal choice for those looking to renew their skin without irritation.

Ingredients to Avoid Mixing with Lactic Acid: To avoid over-exfoliation, it's best not to mix lactic acid with other strong exfoliants like salicylic acid (BHA), glycolic acid (AHA), or retinoids in the same routine. These combinations can cause skin sensitivity and irritation. Additionally, it’s advisable to avoid using lactic acid with highly active vitamin C serums at the same time, as the pH levels of these products may conflict, reducing their effectiveness.