Eat really healthy like the most basic plain stuff you can eat. Oatmeal, beans, brown rice, slamon, tuna, lean chicken. etc western society eats like crap and pretty much anything you buy outside of a grocery store is crap. Right before my jiu-jitsu tournament I had to lose 15 pounds in a month so I ate complex carbs during the day like oatmeal, cereal and pasta and protien at night. This actually worked really well I ended up losing the weight.