The effects of sweet potato starch are as follows: 1, can provide the body with rich carbohydrates, that is, sugar, can be a good supplement to the glycogen in the muscle and the glycogen in the liver, in the relief of muscle fatigue, recovery of physical strength, liver function is very obvious. 2, can reduce the metabolic burden on the kidneys, because the sweet potato starch contains a very small amount of plant proteins, which can limit the intake of excessive protein, to reduce the burden on the kidneys, promote the recovery of kidney function, and alleviate the symptoms of nephritis and kidney failure is very obvious. Because sweet potato starch contains very little vegetable protein, it can limit the intake of excessive protein, which is very obvious in reducing the burden on the kidneys, promoting the recovery of renal function, and relieving the symptoms of nephritis and renal failure.