I currently work 3rd shift and I am having some problems when I eat. 9 times out of 10 I can work the whole shift and feel completely fine. Not get too tired, no trouble staying awake, etc.

However, I find that once I eat something I become very very drowsy. Like I fall asleep while talking to someone kind of drowsy. Most of the time I'm too lazy to bring better food to work, so I just eat left overs from where I work. Its mostly cafeteria food, something kids would eat during school.

Even when I work out before work and take my shake, I get really really tired for about an hour, then things get back to normal. I don't know if it is because I am eating too many carbs late at night, or maybe too much sugar. Beats me.

So what should I do to make this not such an issue? Should I stick with more protein solid food, or maybe avoid eating during night? Any input would be appreciated.
Ty