Bone Marrow

all of a sudden i started feeling a lot happier and less anxious, and the only thing i can think of that was different i did was eat a good amount of the stuff inside chicken bones. what’s in it, and could i be responsible for the rapid change in mood? the only other thing i ate was a bunch of blueberries (but i’ve had this before without such a profound change) and i had piracetam+CDP-choline at least a couple hours before (which normally change positively change my mood, but it usually comes into effect less than two hours after consumption).