When walking down the hair-care aisle in the supermarket, you see lots of enticing brand names proclaiming miracle work for your hair. Bottles bursting with color that contain fruity or floral fragrances promise to handle all of your hair dilemmas with exotic ingredients advertised on each label. Do they really do as promised? Or can they make a bad hair day much worse? And, what about all those hard-to-pronounce ingredients that make you feel like you should have paid more attention in chemistry class? What do they do?