Looking for an eating plan that stands the test of time? Consider keto. The keto diet has been recommended by doctors since the 1920s as a treatment for conditions like diabetes and epilepsy, and since then, researchers have come up with even more uses for this way of eating. Here's what you need to know about what the keto diet does, how it works, and how it feels to live... Looking for an eating plan that stands the test of time? Consider keto. The keto diet has been recommended by doctors since the 1920s as a treatment for conditions like diabetes and epilepsy, and since then, researchers have come up with even more uses for this way of eating. Here's what you need to know about what the keto diet does, how it works, and how it feels to live...