Several versions of Muscle Milk were tested in 2010 by Consumer Reports and were found to contain unhealthy levels of dangerous metals, such as cadmium, arsenic, lead and mercury. Consumer Reports tested Muscle Milk Chocolate powder, Muscle Milk Vanilla Crème and Muscle Milk Nutritional Shake Chocolate.
Cadmium consumption accumulates in the liver and takes several years to clear out of a person's system, according to Consumer Reports. The protein available in Muscle Milk products is not worth the risks people take by consuming several toxic metals present in the liquids and powders. Cadmium is also found in whole foods such as organ meats, rice, shellfish, spinach and potatoes. To obtain healthy protein sources, Consumer Reports recommends eating foods such as red meats, eggs, yogurt, milk and poultry.
These items contain very small amounts, if any, of lead, mercury, arsenic and cadmium.
The Agency for Toxic Substances and Disease Registry lists these metals as four of the most hazardous substances, with arsenic, lead and mercury being the worst offenders, according to Consumer Reports. It is impossible to completely avoid exposure to these metals, but Consumer Reports measured amounts present in Muscle Milk products that exceeded the U.S. Pharmacopeial Convention's recommended limits. It is especially dangerous that the metals are combined in several of Muscle Milk's products, as this can further exacerbate any potential health complications that may arise from exposure.