How can I gain weight?

well if you want fat do what everyones telling you. But if you want muscle alls you have to do is eat a good amount of carbs and proteins and go weight lift and run/swim and then afterwards eat something that has a ton of protein because your body eats away at fat for only about 30mins and then it attacks the muscles because alls their made of is protein and lean tissue and I would suggest eating a lot of fruits and vegtables and meat because their a great source of protein. hope I helped

I eat maccdonalds all the time and I never put on weight

start filling up on carbs and junk food… my grandma says the way to get fat is by eating and sleeping…so that might work too!! =P

well it depends your just going to have to start eatin fattnin food I suppose…