I have few theories why I get hypoglicemia often.
1. my metabolism burns too much energy (I am very slim, always been
slim)
a) because most of the energy is burned by my muscles who have
increased tonus
b) becasue when I study, my brain uses too much energy
2. I have a wierd metabolism 
I always carry something sweet with me and when get hungry, eat
even in seminars infront of the prof, else I would faint if getting
my hypo and not eating. I don't each much, have no proper
appetite.
Maybe becasue I don't each much, I don't have enough energy,
glucose.
I can eat chocolate and coke for days and don't get fat.