THE CLAIM This 100 percent USDA-certified organic argan oil ($40; oliebiologique.com) supposedly does everything but the dishes: It hydrates your complexion, heals cracked skin, tames frizz, and adds shine to hair.
EXPERT OPINION "Argan oil's best feature is its ability to keep skin and hair smooth but not greasy," says Dr. Fusco. Rich in fatty acids, it's also an antiinflammatory and antibacterial agent that's "tolerated by most skin types and won't clog pores."
OUR VERDICT A little goes a long way. Just a couple of drops quickly quenched our faces and left behind a noticeable sheen, though one tester craved a heavier moisturizer during dry winter nights. It's brilliant on hair: Another woman coated her thick, wet, shoulder-length strands with a quarter-size dollop before a blowout and was thrilled by the soft, shiny, frizz-free results, which lasted until her next shampoo a few days later.Read MoreLess