There's Something About Biosilk

Can someone tell me when Biosilk became ubiquitous? A few years ago, hardly anyone was using it, but now it seems that every girl who cares about her hair has a bottle of Biosilk handy. I'm no exception - I even have travel size bottles to throw in my bag on humid days. A few months ago I went on vacation with three girlfriends and forgot my Biosilk, but not to fear - all three of them were