Increased focus and energy
People who initially begin an extremely low-carb diet frequently complain of brain fog, fatigue, and feeling sick. This is known as the "keto flu" or the "low carb flu". However, long-term ketogenic dieters frequently report having greater energy and focus.
Your body has to become used to burning more fat for energy when you start a low-carb diet. A significant part of the brain shifts to burning ketones rather than glucose when you enter ketosis. Ketones are an extremely potent fuel source for your brain. They have even passed clinical studies to treat conditions and disorders of the brain including concussion and memory loss. Therefore, it should come as no surprise that long-term ketogenic dieters frequently experience increased mental sharpness.