Vitamin C is a must-have in any skincare regimen—just ask any dermatologist. More than just the “sunshine vitamin,” this antioxidant is amongst the most extensively studied (and proven) ingredients in the skincare world today, and it offers myriad benefits. From warding off damage caused by free radicals to keeping your skin’s collagen production going strong, the “sunshine vitamin” also helps promote a brighter, more even-toned complexion. But all vitamin C’s aren’t created equal, and it can go by a slew of names on ingredient labels. The good news is, we’ve done the legwork for you, and these products are sure to deliver results you can “C.”

SkinCeuticals

As the brand that discovered exactly how to make the most effective vitamin C serum (it has to do with the form, pH and concentration), dermatologists and celebrities like Kristen Stewart and Rosario Dawson can’t get enough of their award-winning C E Ferulic, Phloretin CF and other vitamin C-based serums.

iS Clinical

iS Clinical understands the power of vitamin C, which is why they offer three serum options to meet a variety of skin needs. Between the new comprehensive rejuvenating GENEXC Serum (beloved by celebrity aesthetician Shani Darden), Pro-Heal Serum Advance+ for blemish-prone and aging skin (a favorite of Rosie Huntington-Whiteley) and January Jones’ favorite skin-refining Super Serum Advance+, there’s a vitamin C for everyone!

Kiehl’s Powerful Strength Line-Reducing Concentrate

Packed with two different types of vitamin C for a total 12.5% concentration along with skin-plumping hyaluronic acid, you get major antioxidant protection and hydration in every pump of this supercharged serum. Say bye-bye to fine lines and wrinkles in as little as two weeks and hello to instantly improved radiance and texture—Alison Williams and Taylor Schilling did before this year’s SAG Awards.

Vitabrid C¹² FACE Brightening Powder

Want to turn any serum, moisturizer or oil into a vitamin C anti-aging powerhouse? That’s exactly what you can do (and Korean superstar actress Park Min-young does) with this powder. Just add a dash or two into your product of choice morning and night to provide the skin with a steady stream of antioxidant protection (and correction).

Drunk Elephant C-Tango Multivitamin Eye Cream

With a potent combination of five types of vitamin C and eight rejuvenating peptides, this antioxidant-rich treatment is designed to protect, brighten and strengthen delicate skin around the eyes. The clean, “green” formula also features ceramides, plant-based oils and soothing ingredients that won’t irritate sensitive skin—and we’re sure brand loyalists like Gwyneth Paltrow, Kourtney Kardashian and Brooke Shields will snatch up this new offering (in the event that they haven’t already).