From glycolic To salicylic, exfoliating acids have quickly become a mainstay in our beauty routines. But lactic acid seems to be the least known of them all, despite being favored by dermatologists for brightening and hydrating the skin, as well as treating a variety of skin problems.
Lactic acid, which is naturally found in dairy products, has been used for skin care since ancient Egypt, when Egyptians (including Cleopatra) bathed in milk to improve the appearance and texture of their skin. Nowadays, it is usually created in a laboratory and is often combined with other beneficial ingredients. serum And cleansers to achieve smoother skin.
Here, we ask seasoned dermatologists to tell you everything you need to know about lactic acid for skin, including where to find it and how to incorporate it into your routine.
What is lactic acid?
“Lactic acid is an alpha hydroxy acid (AHA) and a versatile ingredient that can help treat a range of skin problems,” says Dr. Derrick PhillipsConsultant Dermatologist at CeraVe. A natural by-product of lactic fermentation, it is what gives sour milk its characteristic tangy taste.
And while we're unlikely to be swimming in sour milk anytime soon, we can also find lactic acid in some over-the-counter skin products. “In skin care, lactic acid is primarily used for its exfoliating properties and promotes skin renewal,” says Dr. Phillips, “However, it can also improve skin texture, has anti-aging properties and has been shown to reduce pigmentation“
Lactic acid for skin: how it works
1. Exfoliates the skin and promotes cell renewal.
“Lactic acid breaks down the bonds between dead skin cells in the outer layer of skin, allowing them to be shed more easily,” says Dr. Phillips. All this means smoother skin, more even tone and softer lines.
2. Helps with acne and acne scars.
Lactic acid accelerates skin renewal, promoting renewal. “This process not only makes the skin look fresher and more youthful, but also helps unclog pores, which can be beneficial for treatment. whiteheads, acne And acne acne“, notes Dr. Phillips.
3. Increases hydration
Lactic acid is also a powerful humectant, meaning it helps attract and retain moisture in the skin, keeping it hydrated.
4. Supports the skin barrier.
“Lactic acid has been shown to improve skin barrier function by increasing the production of ceramides, which help maintain a waterproof skin barrier by reducing skin moisture loss,” says Dr. Phillips.
