One of a line of military commanders who from 1192 until 1867 were generally the actual rulers of Japan, although nominally subordinate to the emperor.
I am looking for vitamins that I can take that will increase blood flow to my penis. I heard the more blood flow to the penis, the better you perform (last longer) in bed. I did some research of my own on Google and found on a few websites where people said vitamins E, B1 (thiamine), B3 (niacin), and B12 are... show more I am looking for vitamins that I can take that will increase blood flow to my penis.
Contraction and relaxation of the circular muscles decrease and increase the diameter of the vessel lumen, respectively. Specifically in arteries, vasoconstriction decreases blood flow as the smooth muscle in the walls of the tunica media contracts, making the lumen narrower and increasing blood pressure.