goop - May 3, 2026

radiance, redefined

Meet our new 20% Vitamin C+ Advanced Brightening Serum.

new Vitamin C+

When we first launched our vitamin C serum, it was the most powerful two-part L-ascorbic acid serum on the market. That’s still true today, but we wanted to raise the bar even further on what’s possible with topical vitamin C. So we took the formula—a combination of potent 20% L-ascorbic acid, ferulic acid, and tri-molecular-weight hyaluronic acid—and boosted it with the skin-soothing extremolyte ectoin.

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an innovative two-part design for maximum potency

“You really see results on your skin—next-level glow, softness, smoothness—when you use this serum. People will ask you what you’re doing.”

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powerful ingredients, compelling results

clinically proven to improve skin radiance

radiance, redefined.

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