Essential amino acid requirements

Lyle McDonald lylemcd at onr.com
Tue Dec 14 22:20:19 EST 1999


Bill R wrote:
> 
> pathos wrote:
> >
> > In article <385626D5.4786 at erols.com>, Stuart Dunn <dunns99 at erols.com> wrote:
> >
> > >  Protein intakes far above 100g increase the risk of
> > > kidney failure, and certain types of protein, such as egg white protein
> > > and casein, increase the amount of calium that is removed from the
> > > bloodstream by the kidneys. In extreme cases, this causes kidney stones.
> > > If that calcium that is lost is not properly replaced (from milk,
> > > calcium pills, or food), osteoperosis will result.
> >
> > Sounds to me like this can be substaintiated with a paper or two.  You
> > state is a fact and it may be a fact but let the studies decide that.
> 
> The person above is failing to consider that for a valid
> comparison, all other parameters should be the same:
> same total calcium, same total phosphorus.
> 
> I bet that is not so in whatever study he is looking at.
> 
> In any cases, the demographic group with the highest
> bone mineral density -- namely, weightlifters -- also
> is one with among the highest protein intakes. So it
> certainly is not true that high protein diets *will*
> cause calcium loss.
> 
> This would be apparent to anyone capable of even
> a modicum of thought.

All I'll say is that the vegan/anti-protein folks really need to look 
at more current reseearch.  The protein-calcium loss is far from 
proven and recent research suggests that the early studies suggesting 
kidney damage were drawing false conclusions.

They might want to check out the paper:
Millward, DJ.  "Optimal intakes of protein in the human diet" Proc 
Nutr Soc (1999) 58: 403-413.

Rather than quoting from 20 year old books.

Lyle



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