Endorphins junk science after all.

So now, it turns out that endorphins were a myth, junk science, the molecule is too large to penetrate the ‘blood brain barrier.’ they are thinking the runner’s ‘high’ is due to endocannabinoids, related to…yes you got it…pot! And endorphins are a natural, fleeting painkiller but they are not the ‘high’ everyone has talked about since the 70’s. What a crock.