With the right scientific studies, you can make pretty much any food sound like it’s going to kill you. This is a hard point for people to understand.
The point is that yes, there are real reasons to be concerned about basically any food that we consume, if that food is being consumed in large quantities, to the exclusion of other food. Or, as McEwen puts it, “Maybe you shouldn’t juice a pound of kale and drink it for breakfast every day.” But that doesn’t mean kale is bad for you. It just means that no food is a miracle food, and bingeing on anything — even kale — has its drawbacks.