Whether protein powder hurts the kidneys or not is firstly closely related to the amount of protein powder used by the patient and whether the patient has underlying kidney disease. First of all, the main component of protein powder is protein, which is needed in normal human body. If too much protein is consumed, the metabolism of protein in the body will produce nitrogenous waste toxins, such as urea nitrogen. If too much protein is consumed, too much nitrogenous waste is produced, which will increase the burden on the kidneys. Secondly, if the patient has poor kidney function, after using protein powder, it will increase the protein leakage from the kidney. This will all end up damaging the basement membrane of the kidneys and further aggravate the damage to the kidneys. Therefore, it is recommended that everything should be in moderation, and the consumption of protein powder must be taken as needed according to your weight and consumption.