If "summer" is a verb for you—as in, "I summer in the Hamptons," you might already know about Dr. Kenneth Mark. The dermatologist works with some of New York's and Aspen's fanciest faces, focusing on cosmetic treatments such as Botox and chemical peels. I'm not interested in those things, but one of his creations definitely caught my eye.

Kenneth Mark Antioxidant Hydrating Cream ($95) is a pricey cream, for sure. But here's what's cool about it: it contains astaxanthin, which is up to 10 times more potent than other antioxidants. Since antioxidants fight free radicals, which cause aging, this cream is a power punch of good-skin stuff. By the way, its rarity helps explain the product's high price; synthetic astaxanthin fetches $2000 a kilogram on the market, while the natural stuff (which is harvested from sea organisms) goes for more than $7000 a kilogram.

I've sampled this cream, and although it's a lightweight cream, it's surprisingly hydrating. Plus, it's used in the Ritz-Carlton spa in Aspen, which makes me feel kinda fancy myself.

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