I used to work nights and go to gym straight after ( 7 AM ) , I had breakfast 2 - 3 hours before , and everything was fine.. Right now I work days , so im at the gym an hour after I wake up. I've heard that breakfast wont matter since you need to eat at least 2 hours before exercising. Im mixing some l-arginine + bcaa + glutamine + 2 redline pills ( same things I've been taking before ) First day ( yesterday ) I had a massive headache at the gym , today I added some whey to the mix , it helped a little but not much , still headache. I didnt change anything as far as my routine , still drink a lot of water so no dehydration , breathing is not a problem either... Could not eating a breakfast be such a big thing for me ?