[nabnob]

>Sugar is the biggest threat to weight loss because the calories from sugar go straight to fat, and the sudden increase in high glycemic index input triggers an insulin response, which makes you feel like a yo-yo merry-go-round of energy/despair.

I've had problems with fatigue/low energy for a while now - I always crash in the afternoon around 2pm, roughly three hours after eating my first meal of the day. After doing some research I decided to cut out sugar and flour in the morning, and the results have been dramatic. My problems with energy and fatigue were getting so bad that I was starting to think I had a chronic illness - nope, just crashing from insulin every day!