Hi thanks for your valuable questions. U need very high calorie by a balanced diet. Ensure that u v high quality protien almost 25% of tot calorie.Your required per day energy should be not less than 3800 kcal. so u can go for that calculation. u can take Protinex from Pfizer or ENSURE sports man protien powder from Abbott India .Take complete foods plans full of vegetables, fruits. Best cereals & mastrd oil cooked . Almonds, Dry fruits, milk,dairy product, organic protien are good from foods. Take priority on daily diet.