Protein is a vital macronutrient needed to support optimal health, nervous system function and muscle repair. Whey protein is particularly popular because it is easy to digest, convenient to use and very inexpensive for supplement companies to produce. According to Sangster's Health Centres, "Whey protein has been researched in prevention and life extension studies for such things as cancer, AIDS and other degenerative diseases." Despite a plethora of positive benefits, however, whey protein has its share of dangers.
Kidney Stress
Excess quantities of whey protein can cause kidney stones, or calcium deposits in the kidney. They can be very harmful to the urinary system if left untreated. The National Institutes of Health, or NIH, claims that "...extra protein causes calcium to be excreted from the body, raising calcium levels in the urine." The NIH suggests a moderate protein diet even if you have not had a history of kidney stones. If you consume more than the recommended dietary allowance of protein for your age, check with your doctor about how to prevent kidney and urinary problems before they start.
Fat Gain
Although whey protein supplements are low in calories and do not generally contain high levels of fat or carbohydrates, excess protein can be stored as fat, notes the American Council on Exercise. Remember that a whey protein supplement should be used to fulfill protein deficiencies not met by your solid food caloric intake, and is not meant to be consumed in excess.
Ketosis
Excess whey protein can cause ketosis, a condition that Northwestern University Health Sciences describes as a state of starvation when the body produces ketones. Ketones are strenuous on the kidneys and can impair cognitive function. Ketosis can also cause dehydration, especially if you are losing a lot of water by exercising. Northwestern University Health Sciences further reports that ketosis can also cause insulin resistance and glucose intolerance, two primary factors in coronary artery disease.
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