You can drink protein powder during weight loss. In terms of diet, we should pay attention to the following points: the daily diet should include cereals, vegetables and fruits, fish, eggs, soybeans and so on. Eat 250 ~ 400g of cereals and potatoes every day, including 50 ~150g of miscellaneous grains and beans and 50 ~100g of potatoes. In addition, eat more vegetables, milk and soybeans, of which vegetables and green leafy vegetables account for half of vegetables. In addition, regular consumption of soy products, moderate intake of nuts.