All products featured on Allure are independently selected by our editors.

However, we may receive compensation from retailers and/or from purchases of products through links in this article.

The benefits ofvitamin C serumsare vast.

Image may contain Face Happy Head Person Smile Laughing Adult Accessories Earring Jewelry and Photography

Getty Images

But how exactly does it work on the skin?

Ready to feel more confident when reading your beauty products' ingredient labels?

Enter, theAllure Ingredient Index.

SkinCeuticals C E Ferulic in clear amber bottle with black pipette on light gray background

First off, what is vitamin C?

In other words, antioxidants help keep our body and our skin cells healthyand looking that way.

This free-radical-fighting power isn’t just important for helping to keep signs of premature aging at bay.

Naturium Vitamin C Complex Serum gray bottle with peach label on light gray background

How else does vitamin C benefit the skin?

Amazingly, vitamin C’s skin-saving benefits aren’t only attributed to its antioxidant properties.

Remember:Collagenand elastin are both naturally occurring protein fibers that help keep skin plump and firm.

Paula’s Choice C15 Super Booster white and orange serum bottle on light gray background

And it’s melanin formation that causes skin discoloration likedark spots and hyperpigmentation, Dr. Wexler explains.

How can you add vitamin C to your daily skin-care routine?

Moreover, addingvitamin Einto the mix is like a one-two punch of skin-saving goodness.

L’Oréal Paris Revitalift Vitamin C Vitamin E Salicylic Acid Serum white and orange serum bottle on light gray background

As a general rule, serums should be layered underneath your moisturizer andSPF.

Who should avoid vitamin C?

“Those with sensitive skin may have allergies or redness from vitamin C,” Dr. Goldenberg says.