Klein-Becker originally formulated StriVectin to stamp out stretch marks, but by a stroke of anti-aging serendipity (we knew the 'youth' fairy was real), it turned out to be crackerjack at combating crow's feet, too. See, the original samples were marked simply as 'topical cream', so some testers smeared it 'round their eyes and lips 'stead of their thighs and hips. When the 'wrinkle-less' reviews started pouring in, StriVectin's career as a crease-fighter began. And not only does it beat retinol and vitamin C—it outdoes injections, top derms agree.