It has only been just recently that I’ve come to realize the importance of keeping blood glucose levels steady compared to having large insulin spikes and the inevitable crashes, as when blood glucose levels drop severely, that’s when one feels very fatigued. Having steadier glucose levels that don’t vary that much means you avoid that fatigued state. That’s the benefit. No doubt, this has a very big impact on one’s mood. I would venture to guess that depression and low glucose levels go hand in hand.