U might be allergic to certain foods. I know i'm allergic to bananas, but it's been so long since i threw one in a shake, i must've forgot. Today i put one in the Met-Rx shake, took a few sips, and that's all she wrote! I had bad chest pains, i almost threw up, and the back of my throat was itching horribly. Same thing happens when i eat anything soy, fruit seeds period, peanut butter, and oatmeal. I also get severe headaches from too much of the following; caffein, sodium (like chinese food), and certain salt based nitric oxide supplements. It took trial and error, but now i know what's bad for my body. Ever since i eliminated these things from my diet, i've been great! I can get away with certain things taken in small moderation. For example, today i had coffee with milk. I was fine today, but if i'd have it everyday this week, i'd get headaches by the forth day, so i keep it to no more than 2 cups a week.
All in all, u might have to really pay attention to your body. Every body is different, and yours might be sensitive to certain things. Hope this helps. Good luck.
-the mastermind
