This Glowy-Skin Serum Has Been a Best-Seller for More Than 40 Years

This Glowy-Skin Serum Has Been a Best-Seller for More Than 40 Years featured image
Courtesy of Repêchage

If you’ve ever experienced Repêchage’s iconic Four-Layer Facial spa treatment, you’ve tried its best-selling C-Serum Seaweed Filtrate. It’s the first layer in the four-step treatment, and it sets the tone for everything that comes next: a moisturizing cream, hydrating mask and warm mineral mask. Brand founder Lydia Sarfati says C-Serum has been her “secret for perfect skin since 1980.”

Short for cyto-serum (cyto means cell in Greek), C-Serum was one of the first products Sarfati created for her clients to use at home, branching out from the professional spa world. “Nothing is purer or more effective at helping skin look and feel smoother and softer,” Sarfati says about her seaweed filtrate. Here’s what makes this glowy-skin serum a must-have.

The Benefits

The secret lies in Repechage’s exclusive seaweed extract from sustainably sourced laminaria digitata. This is at the heart of all of the brand’s products. This key ingredient is a pure seaweed filtrate derived by a proprietary extraction method that allows the phyto-nutrients to remain in their most potent form. It contains 12 vitamins, including B12, C, E, K, and beta carotene, as well as 18 amino acids and 42 trace elements. All of these help the skin function at a optimal level.

The marriage of the laminaria digitata with glycerin and carrageenan (a red algae with moisturizing benefits) in this serum makes it exceptional at restoring a glow to dull skin. With consistent use, it also helps reduce the appearance of fine lines and wrinkles. C-Serum is oil-free, fragrance-free and vegan-friendly, too, making it suitable for all skin types.

Courtesy of Repêchage

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Key Ingredients

Laminaria digitata seaweed extract, glycerin and carrageenan

How to Use It

Like other serums, you can wear it alone or under moisturizer for an extra boost of hydration. The brand recommends using it twice daily—morning and evening—and that’s how I use it, too. You can also apply it on your neck and décolleté, and even on your hands. I love how lightweight and gentle it is. My skin feels immediately refreshed and soothed after applying it.

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