hair pulling

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This supplement, which includes ingredients like calcium, folic acid, and vitamins A, B (notably biotin), C, and D, has taken the haircare industry by storm with its promise of longer, thicker, stronger, more vibrant hair. While the results might not be quite as dramatic as some users claim, it's worth a try, says Seymour Weaver, MD, a dermatologist who specializes in hair loss. "Hairfinity has many of the right nutrients for strength and growth, and I have clients who have seen positive results," Weaver says. "But manage your expectations: Hair grows only about half an inch each month, so you probably won't notice a real difference for three to six months."

Verdict: Try it!