IMHO the drowsiness has nothing to do with calories, it's the carbs and the related blood insulin spike causing drowsiness. My hint: Experiment with a meal wit

IMHO the drowsiness has nothing to do with calories, it's the carbs and the related blood insulin spike causing drowsiness. My hint: Experiment with a meal without or with very minimal amount of carbs (for example eat a salad with meat or something like that) - that keeps you full of energy and doesn't drive your productivity down or that is at least how it works for me.