What to if i am skinny and i eat lots of fatty foods. how to i put on weight fast?

High Protein & Carb: Diet is what body builders use to gain weight (carb loading). I suggest you eat at least 100 grams of lean protein per day (lean meats, eggs, cheese and whey protein shakes) as well as at least 150 grams of complex carbs (fruits/veggies, whole grain starch) in 3 meals and 2 snacks.Eat some protein right after work-out plus 15 grams of sugar (milk chocolate for example).Numbers vary based on weight.