Remember the "Alien" franchise?  Cyborgs have milky white blood.  Check out this body building competition.  Keep your eye on the guy on the far left of the line, especially in the shoulder area.  I knew those guys weren't real!

What is that, he's leaking white fluid, all the steroids are leading out

Maybe that's what we can use to test pro athletes for steroids -- just a little pin #$%!*@! and see what oozes out -- red or white.