bio oil's been around for quite sometime now..but they dont sell it in america last time i checked. I've been to different forums..and iono..this bio oil stuff sounds like it works just like vitamin e oil. But i woudn't know, i've never tried it. Although from what i've heard from different forums, it doesn't really make a difference on your old stretch marks.
If you don't put nething on your purple stretch marks, it will fade eventually. So, don't think that because u put products in it lighten your stretchmarks from purple to silver. It will naturally do that on its on. So, if thats your goal..to lighten ur stretchmarks..then don't waste your money. However, do make a goal to put products on so that it minimizes your stretchmarks and be less visible. That's the hard part.