Which Diet is Best? Keto, Paleo, Intermittent Fasting, Mediterranean, Vegan, Gluten-free, GMO-free, lactose-free. Sheesh! Which one is best? Here’s the truth about the “best diet.” No one knows the truth! Let me break it to you gently— there is no “best.” The verdict is still out —WAY out— on the pros and cons of each