Is this normal? Does it happen with anyone else here? Can anyone explain it?

[iamaboringperson]

Yo,

If I have lot's of filling food, I feel tired and can't concentrate and want to sleep.

But if I don't eat much except (for example) a few cookies, and perhaps only have a large (but not very large) meal late at night, I feel a whole lot better.

I can certainly concentrate better, and I'm usually happier.

[iamaboringperson]

bloodline wrote:
...

PS you might have an insulin related problem.

I was actually thinking that. I've had this theory about getting too much sugar and getting too much insulin which makes me feel tired.

Not sure though.