deal of the day

This Rarely-on-Sale Vitamin C Serum From Sunday Riley Is Half-Off

Photo-Illustration: The Strategist; Photo: Retailer

Of all the serums, essences, and elixirs one can buy, vitamin C will always be my top recommendation for anyone trying to get a little something extra out of their skin-care routine. The antioxidant addresses nearly every skin issue one might have — from hyperpigmentation to dullness to environmental stuff (like pollution) that wreaks havoc — and is the perfect daytime complement to a nighttime skin treatment like retinol. Though effective, vitamin C is notoriously unstable and sensitizing, which is why whenever we’ve written about it, we always stress the importance of formulation.

One of our favorite such formulas is the rarely-on-sale Sunday Riley serum, which uses THD ascorbate — a highly stable form of vitamin C that’s also relatively well tolerated by most skin types. But this serum doesn’t stop there. It also contains pore-minimizing saccharide-isomerate extract, a corn-derived sugar that acts as a humectant, and phytosterols, an ingredient often found in sunscreen that helps to protect against UV damage, which can impact skin’s natural collagen production.

Essentially, if you’re looking for an all-in-one serum that will hydrate, brighten, and smooth fine lines, this is it. But all those benefits don’t come cheap. A full-size bottle will ordinarily cost you just under $100, but thanks to a very good sale at Sephora, it’s currently half-off, bringing it down to a much more affordable $43.

The Strategist is designed to surface the most useful, expert recommendations for things to buy across the vast e-commerce landscape. Some of our latest conquests include the best acne treatments, rolling luggage, pillows for side sleepers, natural anxiety remedies, and bath towels. We update links when possible, but note that deals can expire and all prices are subject to change.

Sunday Riley’s Best-selling Vitamin C Serum Is Half-Off