Memory Hack If done correctly, the result is ketosis, weight loss and better mental acuity and physical energy from the steady fuel of ketones. The Atkins diet, formally called the Atkins Nutritional Approach, was founded by cardiologist Dr. Robert Atkins as a weight loss tool based on the idea of eating right, not less.” Cyclical Ketogenic Diet (CKD): Similar to intermittent fasting Down Day Up Day” or the 5/2 cycle, CKD involves eating a low-carb, ketogenic diet for several days followed by a couple days of eating high-carb. Fish is a great source of protein as well. It's rich in protein and low in fat. Lean meat is the cornerstone of the paleo diet.