Answer:
Whey protein is generally safe for most adults when used appropriately, Mayo Clinic experts say. But too much can lead to unwanted side effects, such as nausea, bloating, cramps, reduced appetite, fatigue and headache.
It may be high in added sugars and calories. Some protein powders have little added sugar, and others have a lot (as much as 23 grams per scoop). Some protein powders wind up turning a glass of milk into a drink with more than 1,200 calories. The risk: weight gain and an unhealthy spike in blood sugar.
Explanation:
Whey protein is a mixture of beta-lactoglobulin, alpha lactalbumin, bovine serum albumin, and immunoglobins. Possible benefits include weight loss and lowering cholesterol. Possible dangers include nausea and headaches, but at moderate doses, whey protein is not considered dangerous.