Happy Tuesday readers!  Hoping your weekend was great!

Awhile ago, I posted on alpha hydroxy acids, otherwise known as AHAs and why they are important in skincare. (In case you missed it or need a refresher, click here)  Lactic acid was one of the AHAs mentioned and here’s why this ingredient is great.

Who: Lactic acid

What skin conditions can it help: Aging and hyperpigmentation

Where it comes from: Derived from milk/sugar

Why it’s important: Lactic acid functions as a humectant, which attracts water and hydrates the skin.   It breaks down the bonds between cells that allow for easier exfoliation of the skin, reducing the appearance of wrinkles.   It also reduces hyperpigmentation due to its ability to suppress the formation of tyrosinase ( the enzyme involved in melanin production).  Because its molecular structure is bigger than glycolic acid, it’s an ideal ingredient to use for those who have sensitive skin because it permeates into the skin slowly, reducing the chances of irritation and inflammation.

How it’s used: Lactic acid can be found in skincare products (i.e. cleansers, toners, moisturizers, serums) and also in professional treatments like chemical peels.  *Like any other exfoliating agent, limit use to a few times per week, wear sunscreen and use caution when using ingredients containing retinol as this can irritate skin.

If you follow my Instagram, you’ll recognize the picture below when I took the Cosmetic Chemistry course at UCLA.  The vial on the right-hand side is what natural lactic acid looks like.

I recently joined Twitter (@stephieestie) so feel free to follow me on there too! I’m still learning how to use it, FYI, but I’m sure I’ll get it in no time. 🙂

Thanks for reading,

Stephanie