Probably not but it want hurt to eat them either. After 30 years of pumping and other crazy length gimmicks I have gained about 1/2 in length and 2 inches in girth. If you have 6 inches work on girth. I have came from about 5 inches up to 7 1/2 in girth and it is permanent. Get you a good Vaccum pump and pump it every day.
In my opinion, I think is possible but at the same time is gonna be really hard to reach these numbers.