Patients with renal insufficiency should determine whether they can eat sweet potato flour according to their current renal function and the degree of their condition. Patients with renal insufficiency are recommended to have a low-salt, low-fat, high-quality protein diet. High-quality protein is high bioefficacy protein, that is, animal protein, such as fish, eggs, sweet potato flour is rich in protein content is relatively small, but sweet potato flour is rich in potassium, and sweet potato flour cooking process is to absorb a lot of water, if renal insufficiency patients do not have a combination of hyperkalemia, there is no obvious water and sodium retention, at this time you can eat sweet potato flour. If renal insufficiency patients combined with hyperkalemia, it is recommended that patients eat less sweet potato flour. Renal insufficiency patients, if combined with obvious sodium retention, also insist on the recommendation of less sweet potato flour, because sweet potato flour in the cooking process to absorb a lot of water can cause sodium retention. If there has been uremia for hemodialysis patients, we recommend that patients eat less sweet potato flour, because hemodialysis patients basically have no urine, eating a lot of sweet potato flour, not only can cause hyperkalemia, but also can cause water-sodium retention leading to heart failure episodes.