It can brighten and soften your skin and even ward off wrinkles. Is soy the newest skin-care multi-tasker?
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Jang's take on the anti-aging benefits of soy is cautiously optimistic. “We know that estrogens can promote collagen thickness,” she says. “Some research shows that a soy isoflavone called genistein can stimulate collagen, but it has never been demonstrated in human studies.” There is proof, however, that genistein acts as an antioxidant. “It's anti-aging because it neutralizes free radicals,” says Jang.
Smooth talk
The same high-protein content that makes such foods as tofu and tempeh smart dietary choices also plays a role in soy's skin-smoothing properties, says Schmalenberg. “Soy contains proteins that help with skin texture,” she says. “The isoflavones also help because they are anti-inflammatory and decrease the reactivity of the skin.” Ray Mauro, manager of global product development for Origins, says that soy's moisturizing properties may also contribute to a smoother, softer-looking appearance. Origins uses soy lecithin - a substance extracted from soybean oil - in some of the products in its new Organics line. “It's dual-purpose,” says Mauro. “We sought it out as an emulsifier, but it's also very hydrating.” The smoothing powers of soy also extend to hair follicles. “It can reduce the amount of hair growth and the shaft size of the hair,” says Schmalenberg, citing a 2001 study, published in Experimental Dermatology, in which 95 percent of subjects saw a noticeable reduction in the appearance of hair after four weeks of topical application.
No matter what skin-care concerns you're targeting with a soy-based product, you need to use it every day for at least one month to see results, says Schmalenberg. “Your skin is going to reflect light better and look smoother and more translucent,” she says. And be prepared: Because soy is both natural and multi-purpose, you'll soon be spotting it in even more beauty products, she adds. So, believe the hype: This is one superfood that's good for your constitution and your complexion.
