Here's What You Need to Know About Keto, Whole30 and Paleo Diets

Just when you got used to accommodating vegetarian, vegan, and gluten-free diners, a new set of dietary requests entered the mix, from Paleo to keto, Whole30, and the nebulous-but-omnipresent “plant-based.” Here’s what you need to know about these diets and what their followers can eat. 

People trying to channel their inner caveman might consider a Paleo diet, first promoted in the 1970s by gastroenterologist Walter Voegtlin. The idea is grounded in the belief that...