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Moderate alcohol consumption does not pose a risk to healthy kidneys. In fact, studies seem to indicate that moderate drinking may actually reduce the risk of kidney cancer and chronic kidney disease.
Having said that, though, it's still wise to note that the key words in the phrase "tossing a few back" are, "a few".
Even if you are a moderate drinker, be aware that alcohol can put a strain on the kidneys in a number of ways.
Having too many drinks too often can cause the kidneys to enlarge, and can increase the risk of diseases of the liver, which can damage the kidneys in the form of kidney failure.
Imbibing too frequently and too well can increase the risk of high blood pressure, which can lead to kidney disease. It can also increase the risk of diabetes, which can lead to kidney failure.
Indulging too freely and extensively can increase the risk of albuminiria (too much protein in the urine).
The cells in the muscles may release electrolytes, which then triggers osmosis (taking water from the cells and putting it into the blood stream) to correct the electrolyte imbalance.
This drying out can have a damaging effect on cells and organs.
Alcohol consumption irritates the kidneys and affects hormone regulation of water balance in the body. The pituitary gland in the brain manufactures vasopressin, or anti-diuretic hormone (ADH).
ADH regulates the kidneys' fluid output through urination, and controls the concentration of the urine's contents. When ADH is not doing an optimal job, we lose too much water.
The kidneys control the amounts of electrolytes like chloride, magnesium, potatassium, phosphate and sodium. Alcohol consumption affects the amount of electrolytes in the bloodstream, so that the amount is too high from some types of alcohol, or too low from others.
In the case of hard liquor like vodka or whiskey, release of ADH slows down, and urine production is increased. Now the amount of electrolytes in the bloodstream is too high.
This leads to excessive fluid loss through urination and can cause dehydration.
Beer, on the other hand, dilutes the concentration of nutrients in the bloodstream when too much water enters the body, thus decreasing the amount of electrolytes in the bloodstream.
This is particularly dangerous for someone with liver disease which will also negatively affect the kidneys.
These are sobering considerations to be sure. Let moderation be your guide.
Resources:
The Benefits and Risks of Drinking Alcohol for Your Kidney
http://www.articlealley.com/article_725260_17.html
Albuminuria Risk, Alcohol Use Linked
http://www.renalandurologynews.com/albuminuria-risk-alcohol-use-linked/article/154924
Common Questions: Kidney Health
http://www.kidneyfund.org/kidney-health/kidney-basics/common-questions.html#Is_alcohol_or_soda_bad_for_the_kidneys
Drugs, Medications & Alcohol Use & Your Kidneys
http://www.nwkidney.org/nkc/healthyLiving/preventing/drugAlcohol.html
Complications of Alcohol: Kidney Link
http://www.montana.edu/wwwai/imsd/alcohol/Jace/Final%20Drafts/kidney.htm
Kidneys
http://www.alcoholanswers.org/alcohol-education/health-topics/alcohol-and-kidneys.cfm
Visit Jody's website and blog at http://www.ncubator.ca and http://ncubator.ca/blogger
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