More from Prevention.com: Get Your Kids to Love Exercise While only time will tell what Armstrong’s legacy will be—Cycling hero? Cheater? Cancer crusader?—and questions remain as to whether he did or didn’t dope, one thing’s for sure: The issue brings to light the shady world of sports-enhanching supplements. Some are legal, some aren’t, and all are geared toward fueling athletes’ desires to meet the ever-increasing standard of athletic achievement.  [sidebar]If you’re the parent of a young athlete—or if you’ve ever taken sports supplements yourself—you’ve likely got a lot of questions about the risks. We’ve got you covered with our Parents’ Guide to Common Athletic Supplements, which outlines the differences between the protein powders sold at nutrition stores, sketchy supplements, and dangerous illegal steroids.