i have been using something similar to Bio-Oil its £2.49 from B&M and i have found it leaves my skin lovely. At the moment i am ok skin wise not too loose or baggy,i am quite lucky i have good skin, though i had noticed my skin was getting slacker anyway as i have hit my late 30's just things like my hands looking older etc.
I had quite a big tummy area but didn't have any stretch marks on it even though i was i size 18-20 before and now 12-14 now its ok.
Its worth trying this oil, my sister recently had a single breast masectomy and she is using the original Bio-Oil on her scar as it is proven to be good on scaring and stretch marks, and was recommended to her by her Cancer Nurse.
Good Luck Hon x