keto provide an immediate hit of energy for your brain, and up to 70% of your brain’s energy needs when you limit carbs. Fat also feeds your brain and keeps it strong. Your brain is at least 60% fat, so it needs loads of good fats to keep it running. Essential fatty acids such as omega-3s help grow and develop the brain, while saturated fat keeps myelin the layer of insulation around the brain strong so your neurons can communicate with each other. Ketosis helps the brain create more mitochondria, the power generators within your cells. More energy in your cells means more energy for you to get stuff done.