"Historical records of extremely high protein intakes in humans show that daily intakes of protein above 45% 'of energy intake] in adults are associated with weakness, nausea, diarrhea and ultimately death, whereas daily intakes of 20-35% protein are without ill effects....

"A high protein diet has been shown in human and animal studies to increase calcium excretion...From these findings the authors suggest that excess protein...in habitual diets 'frequent consumption] may augment calcium excretion in the urine, particularly in the elderly. 'As] high protein diets lead to increased urinary calcium loss 'this] could be hazardous particularly for females due to its involvement with bone health."

By: Yuzo Hayashi, NPO Communication Ctr. for Food and Health Sciences, Tokyo 135-0004, Japan.

In: The Journal of Nutrition, vol. 133, 2003. This is the Official Pub. of the Amer. Soc. for Nutritional Sciences.

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