All skin naturally ages, and your genetics play the biggest role in that process.

Whileprevention is the best wayto keep skin from aging prematurely, sometimes the damage is already done.

Beauty brands claim that PHAs can increase skin hydration and help promote skin cell turnover (viaHealthline).

Smiling woman holding a dropper and bottle

PHAs work by penetrating the skin to dissolve the bonds between dead cells and then removing them.

This uncovers healthy cells and helps your skin appear brighter and more evenly textured (viaHealthline).

They have an added bonus of being hydrating.

Hands each different bottles of a skincare product

This essentially makes both the Vitamin C and the PHAs useless on your skin.

Dermatologists recommend applying one in the morning and one at night to avoid this situation.

Another popular skin care ingredient,retinol, should not be mixed with PHAs either.

Retinol by itself can be irritating, especially to sensitive skin.

But combining it with PHAs increases the likelihood of a skin reaction.