Yes, 710 calories is definitely not enough, and will cause headaches like that. Be sure you listen to your body when it's giving you signals like that.
Eating something like peanut butter is a great idea to boost your calories. Also drinking fruit juice/milk or eating nuts and dried fruits is a quick and easy way to get calories without having to eat a lot.
I would suggest you plan out ahead of time most of what you're going to eat though, instead of just picking and choosing as you go. That way you will avoid under and over eating, since it's already all planned out for you.
Edited by: YOJULEZ at: 12/8/2012 (13:07)
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