I've been on a low glycemic index diet for the past 8 years, combined with regular snacks and exercise. The background to this is that I had trouble concentrat

I've been on a low glycemic index diet for the past 8 years, combined with regular snacks and exercise. The background to this is that I had trouble concentrating at university. Went to the doctor, who sent me for tests that confirmed I'm hypoglycemic. Today, I can still notice the drop in concentration and the intense desire to take a nap after eating the occasional high GI food. But my mind is very clear when I eat correctly, so that's enough motivation to keep it up. Of course, the health benefits are a nice side-effect - I became quite skinny from losing what little fat I had, so I had to work out to pick up some weight. A few points to address some of the other comments: It's not necessary to go extremely high protein, and increasing your fat intake may do more harm than good if you don't work hard to exclude saturated fats. Don't limit your total carb intake, but choose the right carbs and spread them out across meals / snacks. And some very important points the article doesn't mention: Never skip a meal. Eat breakfast within an hour of waking up. This will help prevent spikes in your blood sugar. I would suggest googling the glycemic index as well as the glycemic load of foods before making any changes to your diet. Apart from giving preference to food that's higher in fibre, healthy fat and proteins, there are some surprises. Once you've passed through the proverbial dip, your taste changes. The cravings for sweet or highly processed carbs are similar to the cravings when giving up smoking. They do pass.