I still dont have enough information, staying away from fatty foods? I dont know what you mean? I mean PB is a fatty food, and its great on cutting or gaining weight. I believe you need a diet journal, track things going in and eat clean foods KNOW how much calories your consuming versus what calories your expending,,,,,,,THIS IS KEY. If you are on the road to gain muscle and lose fat......common sense (no disrespect intended) says the scale will hardly budge IF your losing fat, and GAINING muscle...........CORRECT? This is one reason trying to do both will drive one to the fruit farm, lol (phun intended). Since your young, I would rather see you eat sensibly every 3 to 4 hours, provide a small calorie SURPLUS (which will be used for muscle growth), this is one reason TRACKING calories is important (no matter what the conners say to the contrary). Now, if you want to lose body fat, provide a calorie deficit. You have a decision to make, young man. Bulk or lose fat, doing BOTH at the same time, is not sensable to me (though its possible, its just makes a already hard thing.....MUCH MORE DIFFICULT)