Some protein shakes contain trace amounts of heavy metals that may have potential health risks, according to  These metals include arsenic, cadmium, lead and mercury that can negatively affect the health of certain body organs.  Myoplex, in particular, was tested to contain 16.9 micrograms of arsenic compared with the maximum of 15 micrograms per day.  Protein powder should come from a grass fed cow that was not fed growth hormones or antibiotics.  Designs for Health Whey Cool is a quality protein that is recommended from NutritionSolutions4Life.

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