Best Vitamin C Serum – CNET

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What to look for in a vitamin C serum depends on your personal skin concerns. If you’re concerned about acne, be sure to look for products that are oil-free. “Vitamin C is often formulated with vitamin E for their synergistic antioxidant effects, but vitamin E is an oil and may cause flares on acne prone skin,” says Love. 

Keep in mind that vitamin C serums can be irritating to the skin. If you’re concerned about sensitivity, look for brands that advertise “sensitive skin” or note that the product is formulated to reduce irritation when you shop for products. 

Sometimes it’s OK to buy skin care products and let them sit on the shelf for a few months before using them. But you don’t want to do that with products that contain vitamin C. “L-ascorbic acid [vitamin C] is difficult to stabilize, which is why a ‘steal’ is probably too good to be true. Both air and sunlight can oxidize…

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