For women who have frizzy hair, silicone hair products are a godsend. They seem to add shine, silkiness and manageability to hair that needs taming. And when you straighten your hair, it helps add that pretty sheen to it. But are these "serums," as they're sometimes labeled, aren't all they're cracked up to be. If you're in the market for something that smoothes flyaways, tames frizz and keeps hair in place, then finishing your beauty regimen with a silicone cream, oil or serum could be the way to go. Products such as John Freida's Frizz-Ease line do just that - ease the frizz. But when you see ingredients like dimethicone and silicone in your shampoo, conditioner, gel and whatever other styling products you use, then you could be getting more than you bargained for.