100% due to marketing, influencers, and people wanting to make money.

I remember reading an article from a couple that were professional body builders. It was pretty insightful. I also will not forget that they said they never once drank protein shakes. All of their protein came from their diets, such as eating turkey and other foods.

Also, most people don’t work out hard enough to need a protein shake. It’s usually just extra calories and ultimately turning into fat.