To their credit, low-carb and paleo diet advocates identify insulin as playing a role in the obesity epidemic, but they often don’t appear to recognize the broader scope of insulin triggers. Since carbs increase insulin, the argument goes, we should eat lots of meat, which is just fat and protein with zero carbs. That wouldn’t cause an increase in insulin, right? Wrong. We’ve known for more than a half century that if you feed people a steak, their insulin levels go
