Haven't seen this in any of the diet books I have been using, but am extrapolating from an osteoporosis study I read on medscape.
One of the "concerns" about "high protein" diets is that they may be hard on the kidneys, as our urine becomes quite acidic from the meat proteins.
There may also be concerns about osteoporosis because of this.
The study had the people (men and women at risk of osteoporosis) take a potassium citrate supplement daily. Their urine was less acidic, and their bones grew stronger and denser.
Now, there are certain meds that this may be a problem for, so I am not suggesting we all go out and start this supplement, especially those on BP meds, check with a doctor before starting this particular supplement.
I thought it was interesting though.
on a personal note, still feeling crummy, and having slept off and on during the day, now can not sleep at night of course. Hence reading medscape articles for fun.