L-ascorbic acid: The purest form of vitamin C and a super potent antioxidant. This high (20%) concentration protects against damaging free radicals and improves the tone, texture, and clarity of skin for visibly radiant complexion.

Ectoin: This soothing extremolyte has antioxidant properties to protect against oxidative stress and also supports the skin barrier by preventing transepidermal water loss.

Ferulic acid: This strong antioxidant targets fine lines and wrinkles, hyperpigmentation, and signs of aging by neutralizing free radicals from UV rays and environmental stress.

Kakadu plum extract: One of the highest naturally occurring sources of vitamin C, this extract is also rich in flavonoids and phenolic acid, which help stimulate the production of collagen, reduce fine lines and wrinkles, and reduce the appearance of hyperpigmentation.

Tri- molecular-weight hyaluronic acid blend: This humectant complex binds and attracts moisture to our skin, helping our cells plump and reducing the appearance of fine lines and wrinkles. The three weights penetrate the skin at different levels of depth to target multiple concerns.

No matter what your skin type, it can likely benefit from topical vitamin C. Topical
vitamin C visibly improves the look of skin, and because it’s a super potent antioxidant, it helps protect your skin from free radical damage (and the signs of premature aging that damage can cause). It can also help stimulate collagen by increasing cell turnover, leaving skin looking firmer, brighter, and smoother, with a remarkable healthy clarity and glow.

The challenge with vitamin C is ensuring potency: It degrades and oxidizes quickly when it comes into contact with water, oxygen, or light, even if a formula is made with heavy-duty preservatives. And oxidized vitamin C does not deliver results—so the serum that works well during week one may not be doing much for your skin by week ten.

When we created our 20% Vitamin C + Hyaluronic Acid Glow Serum, we used a game-changing approach to solve that problem: a two-part formulation that you mix at home before your first use, ensuring the serum stays potent down to the last drop. We launched our serum in 2020, and at the time, it was—at 20%—the most potent two-part L-ascorbic acid serum on the market. Six years later, that is still true. And yet: We saw an opportunity to innovate and improve.

Our new 20% Vitamin C+ Advanced Brightening Serum raises the bar, again, on what’s possible with topical vitamin C. The new formula retains the ingenious two-part design of the original, maintaining its potency for the full three months of use. And the new formula retains the impressive 20% L-ascorbic acid, the ferulic acid, and the tri-molecular-weight hyaluronic acid blend. But the new serum is boosted with skin-soothing ectoin, an antioxidant powerhouse, which works synergistically with the ferulic acid to improve the look of skin tone and texture. The result is a serum that delivers a megadose of antioxidants to target dullness and discoloration, help improve tone and texture, and visibly boost radiance—while also providing a super powerful defense against signs of premature aging caused by free radical damage.