How much protein is too much?

[todoveritas]

And as far as whey leading to kidney stones i don't think there are any reports documented on the other hand High protein diets with (real food ie: meats-dry chicken etc...) have been linked to the diets in those who developed kidney stones.

Actually, there is considerable evidence that high-protein diets lead to kidney stones. High protein intake causes hypercalciuria, a known risk factor for kidney stones. Check out: Kidney Int. 2003 Dec;64(6):2142-9.

 

[karachi183]

Actually, there is considerable evidence that high-protein diets lead to kidney stones. High protein intake causes hypercalciuria, a known risk factor for kidney stones. Check out: Kidney Int. 2003 Dec;64(6):2142-9.

I do not disagree. But as far as evidence linked to and specifically "whey protein" that is of question.

 

[todoveritas]

I do not disagree. But as far as evidence linked to and specifically "whey protein" that is of question.

I'm with you Karachi, that's a very good point. As you probably know, most studies (including the one I quoted) used casein as for its protein load and not whey. I'm of the opinion, myself, that it's not the protein, per se, that's causing the kidney stones, but disruption of the Calcium/phosphorus balance. On that note, probably a bigger risk, at least for women and high protein diet, would be the tendency towards osteoporosis.

For anyone interested, the catabolism of dietary protein generates ammonium ions and sulfates that form sulfur-containing amino acids. These compounds are then neutralized by citrate and carbonate which is catabolized from bone calcium. That's generally bad news for women.