I've been using Bio Oil for the past 6 months & my stretch marks have lightened up tremendously. I have been working out so have been using it to prevent any new stretch marks from weight loss and it has worked like a charm.
No doubt is is an amazing moisturizer. It didnt do much for my pregnancy stretch marks though. My stretch marks have faded but they naturally fade. I know bio oil really didnt do anything because I applied a couple of the large sized bottles on my stomach as recommended. I did forget about the ones I had on my inner thighs from pregnancy and when comparing both stretch marks on my thighs to my stomach after using bio oil, they had both equally faded. The key to stretch marks is good genes first off. Keeping skin hydrated with lots of water, maybe take some vitamin e and moisturizing will help. Which bio oil is a good moisturizer. But for $20 a bottle its too pricey for me.
I think its hard to tell if the product actually works or not in terms of stretch marks.. I think many people dont realize, that yes.. after several months your stretch marks WILL not look the same... they all lighten up and turn white. The only way you can tell if its working or not is not using the product on other stretch marks that erupted at the same time.. and then doing a comparison.
I used bio oil on a burn scar on my arm and it worked like a charm. It only took a couple of weeks to fade and after a few months it was completely gone. I don't know how it would have looked without the oil, so obviously can't compare, but I've been a big believer since then and always have a bottle around.
Bio oil really does wonders. I used to get reddish dry flakes around my eyes due to reaction to certain makeup and I put bio oil over night the next day it was perfectly back to normal. I also put it around my elbows and knees and when I feel like my face is too dry i put it all over my skin. It leaves is so soft and moist.