Your excitement leaps of the page. lol, i really hope it works for you. At your tender age of just 20, it is not nice having stretch marks, especially when you have got nice and slim and must be eager to wear summer shorts, bikini etc.
Have you tried Bio oil. They advertise on the tv. It is supposed to lessen the appearance of scars and stretchmarks, and evens out skin tone. I've just bought some from the healthstore for dry skin. I'm hoping fasting will improve that in time.
I expect with fasting the skin is the last thing to benefit, it has to deal with everything else first, once you see the difference in skin, just think how wonderfully healthy you must be on the inside. Great isn't it.