I have never given blood on a diet before, and I typically eat fairly small breakfasts. But I'm worried I'll feel faint and woozy for the rest of the day if I eat like I normally do (and that I won't be able to resist their yummy snacks when I'm done in the interest of my "health"!)
Plus, once I'm done, I have to go sit through eight hours of classes.
What would you eat for breakfast if you were giving blood at 10:30?
(Minus oatmeal. I hate it, no matter how much I try to like it.)
Consider something high-protein; that will stay with you longer.
After donating, they usually have raisins. That would be a good choice as a snack to help bring your blood sugar back up.
Take it easy on yourself. I donated after starting my diet and almost passed out. I also had some trouble getting my energy back, so I had to add high-iron foods to aid my recovery. Good luck.
I know it's too late, but in case others are interested, here is what I do (I used to give blood 4x/year when I was in college):
The night before, start chugging water. Lots of water. Way more than you usually drink. Try for a couple of liters.
In the morning, eat a good breakfast, focusing on carbs since they'll digest the fastest (if you're giving before lunch). Keep drinking water before & after you donate.
After donating, DO accept the juice and cookies. It's not really fair to count calories as usual - some of what you eat is getting sucked out of you!
Thanks to the last two posters! I actually donate blood a lot so that was totally helpful! I didn't know that it burned SO many calories! O_O! Total shock. I do accept the snacks because I definitely start feeling woozy now. I didn't used to, but the past few times I was pretty faint.
It's late now, but for the future: while I cannot give blood due to my anemia and all, I have to undergo a lot of draws. As a result I do get very woozy sometimes and so take a banana with me to the office. When she first noticed me doing this the nurse actually commended me - she had a draw of Mars bars and such for people that suddenly had an energy dip, but confessed she had never thought of bananas. Now she has a bowl of them on her desk instead! Lol, I felt proud. So, I recommend a good breakfast/lunch beforehand and taking along a banana! Or, of course, the snacks you are given. As loxosceles said it's not really right to count calories when you're giving blood.