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[IP] FW: NNF - Low-Carb Diet Bad for Bones and Kidneys

Dear friends,

In light of some recent threads, I thought the following might be of
interest.  It's forwarded with permission in its entirety.  Subscription
information is at the end.

Jim Handsfield
email @ redacted

The opinions expressed are mine alone and do not necessarily represent those
of my wife who runs our house and makes more important decisions than I do.

> -----Original Message-----
> September 17, 2002
> "Nutrition news is important.  We help you understand it!"
> Today's Topic: Low-Carb Diet Bad for Bones and Kidneys
> The high level of interest in low carbohydrate diets, which are high
> in protein and fat, motivated scientists to study the safety of such
> programs.  Ten healthy subjects ate their usual diets for two weeks, a
> severely carbohydrate-restricted diet for two weeks, followed by a
> moderately restricted diet for four weeks.
> The acid load in urine was increased significantly, raising the risk
> of kidney stones.  At the same time, calcium in the urine increased by
> over 60 percent.  The increased calcium excretion was not compensated
> by increased absorption from the intestine.  Therefore, calcium
> balance decreased by 40 mg per day or about five percent of usual
> intake.  The study appeared in the August 2002 edition of the American
> Journal of Kidney Diseases.
> HERE'S WHAT YOU NEED TO KNOW:  Although this study was
> too short to observe a change in bone density, if this pattern were
> followed over years, it would almost certainly lead to osteoporosis
> and possible kidney stones.  Although the number of subjects is small,
> this is compelling evidence against unbalanced diets.
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