Some people think that whey protein powder does not have any side effects on human body. In fact, if it is taken in normal dosage, it does not have any side effects. But if it is taken in excess, it will inevitably bring some side effects, and even the best things are too much. Excessive use of whey protein powder can easily lead to the risk of heart disease, because if the decomposition products of protein accumulate too much, it will inevitably affect the normal operation of liver and kidney functions, and at the same time, it will reduce immunity to a certain extent, and if it is taken too much, there may even be the risk of cancer. Therefore, the dosage of whey protein powder should be strictly controlled, and it is best to take it under the advice of a doctor or dietitian. The side effects of whey protein powder do exist, but as long as you follow the correct method and dosage, you can completely avoid this side effect.