Clarins tonic body oil is amazing. I use it - no stretchmarks yet- and other friends have used it and avoided any at all. I also think the trick is to make sure you are applying whatever you decide to use at least twice a day and are really massaging it in. I think that some skins may be more prone to stretchmarks but others can be avoided or at least minimized by regular application of a highly toning and moisturising product as this will keep the skin supple thus elastic and not as prone to stress.

I am also layering the Mustela cream over my Clarins but many friends just used the Clarins on its own.