To lose overall body weight while losing fat and gaining muscle — for 4 days a week, all of your meals should be lean (but still containing good fat), with the right ratio of simple carbohydrates, such as brown rice, whole grain bread, potatoes etc, always included with complex carbs such as veggies. (lovingfit.com)
Fact: Studies of testosterone supplementation have shown that although it produces a slight increase in lean body mass, and decreases fat mass by up to 2 kilograms, testosterone causes no change in overall body weight when compared with placebo (newscientist.com)
Despite aiding you in adding more muscle tissue during overall body weight gain, a diet high in protein (for example, 30 % of your total daily calorie consumption) will also aid you in sparing precious muscle tissue during a weight loss / cutting plan and will prevent you from regaining the same weight after you've lost it. (fitnessandpower.com)