Talk:Bloodbending/@comment-72.197.214.47-20120626202612/@comment-60.240.188.38-20120627014045

The concentration of metals in blood is actually pretty low. We're talking 83% water versus trace amounts that are diluted in the blood stream. There's simply not enough for control, and as Southern pointed out the human body is mostly water, control just by using blood would end up tearing veins rather then forcing you to move.