While I embarked on this journey before that news came out, I would have given the keto diet a try regardless. Part of the criteria for that ranked list was whether a diet was sustainable and easy to follow-the keto diet is neither, but it's not designed to be. "I don't recommend people follow strict ketogenic diets for their life," says Dr. Axe. "I recommend 30- to 90-day periods, and after that moving into more of a 'cycling' phase, where you can cycle in and out of keto." Dr. Axe admits that following a keto diet will be difficult for most people, since many Americans have diets high in sugar, salt, and carbs. But he says that the potential benefits-boosting brain health, supporting muscles and overall improved performance at the gym, at the office, and in life-are worth putting in the hard work.