The Insulin Double-Whammy

I've posted before about the combination of being overweight and tiredness in people.  It's easy to think that the excess weight is what makes a person tired, but that's not necessarily the case.

This study looked at the relationship between daytime sleepiness levels and insulin.  Higher fasting insulin levels were positively correlated with sleepiness.  This is why refined carbs are so deadly: they increase hunger which leads to weight gain, and they also make people more sluggish and less likely to exercise.