Protein powder can replenish nutrition and improve the immunity of the body, patients with stomach disease can eat protein powder in moderation, while supplementing other substances such as sugar, to avoid eating too much to aggravate the burden on the kidneys. Stomach disease patients usually have a decreased digestive and absorption capacity of the stomach. The main ingredients of protein powder are soy protein, whey protein, etc. These proteins are broken down into amino acids, which are beneficial to digestion and absorption, can reduce the burden on the stomach, supplement the body’s essential protein, and can also improve the body’s immunity, stomach disease patients can eat in moderation. Gastric patients eating protein powder should be properly supplemented with other substances such as sugar and fat to improve the body’s metabolic ability and promote the decomposition and absorption of protein. Ammonia, urea and other substances produced after protein metabolism need to be excreted through the kidneys, if eating too much protein powder may increase the burden on the kidneys and affect their function. The condition of patients with gastric disease varies, and they should take appropriate protein supplements under the guidance of their doctors so as not to affect the recovery of their condition.