Whey Protein: Is it a Healthy Supplement or Blood Sugar Spiker?

Whey protein is a popular protein supplement marketed as being able to improve athletic performance and build stronger, leaner muscles. It is a complete protein as it contains all nine essential amino acids. Whey protein is marketed as having several health benefits, including supporting athletic performance, diabetes, immune health, asthma, and weight loss, though robust science doesn't yet back up such claims. Despite some of whey protein's health benefits, it's classified as a dietary supplement and isn't tested for safety or efficacy by the U.S. Food and Drug Administration (FDA) the way foods and medicines are.