Think too much. . . This amount is simply not enough. To gain muscle and weight, you should eat a lot of protein and carbohydrates every day. Although oats contain these two substances, you eat too little. . . You are like my classmate. Do you know how to eat muscle powder? A 600 ml cup, three-fifths of which is filled with muscle building powder, should be eaten twice a day, plus normal meals with high carbohydrate.