October 8, 2013

Meat on Kidney Function


SONY DSCThe influence of meat can affect the readings on kidney functions. A study published in Diabetes Care explains what readings can be skewed and how this could affect your overall kidney checkup.

When it’s time for your kidney labs, the renal function tests don’t require you to fast. However, the choice of your last meal may have a negative influence on the results. Researchers wanted to see if creatinine and estimated glomerular filtration rate (eGFR) following a meaty meal would tip the scales.

The creatinine levels are important in kidney function. Creatinine is a waste product that’s produced by your muscle metabolism and to a smaller extent by eating meat. Healthy kidneys filter creatinine and other waste products from your blood. The filtered waste products leave your body in your urine.

Estimated glomerular filtration rate or eGFR is a measurement used to check for the stage of renal failure that a person is experiencing. How well do your kidneys filter the wastes from your body? This is why the creatinine levels were calculated in this study.

In the study, 80 people with diabetes and chronic kidney disease were evaluated. For comparison, subjects ate two meals and the results were calculated. First meal was about 2 ounces of protein from meat with 1 cup of water. The second was about 2 ounces of non-meat protein with about 1 cup of water.

The results showed that the meat protein significantly increased creatinine and resulted in significant fall in GRFin all chronic kidney disease patients. This effect of meat on creatinine disappears after 12 hours of fasting in all study participants.

Wow. It’s amazing to think that if you have Outback the night before you have kidney function tests done, chances are you may have a false positive or two. If you’re craving a prime rib or filet, you might want to hold-off for the celebratory meat feast until your test is well done.

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