I heard it on the Today Show. They said there were only a couple of brands that had issues.
My Dr.s made it pretty clear that we shouldn't have more than one Protein drink a day, and it was for the sole purpose of adding protein to our diet. Three meals and one Protein Drink to get to the optimum total of 90g of protein a day.
So I'm sure they already knew that it wasn't good to live on the protein drinks. They also advocate using chia seeds three times a day in our food or drink to get Fiber. They help to keep things moving, if you know what I mean.