Then stay the hell away from crap like that, beet juice and other crazy dietary supplements. Unlike drug manufacturers, the makers of supplements don’t have to show that their products are safe or effective before selling them...and most of the time they are neither safe nor effective.
There is no physiological 'miracle' in that crap...and most often it's just a box of potential serious damage to your body. Believe me, if that stuff did anything of value, guys like me would be purifying it to make safe and effective drugs from it that would be proven and FDA approved.