Effect of a Vegetarian Diet on Urinary Oxalate Excretion in Healthy Subjects
In the past, calcium oxalate stone formers have been repeatedly advised to become vegetarians, since a diet low in animal protein has been suggested to decrease the urinary excretion of oxalate. The reason for increased oxalate excretion in high animal protein intake was seen as the result of the increased metabolism of phenylalanine, tyrosine, tryptophan and hydroxyproline. All are present in higher proportions in animal than in vegetable protein. The aim of the present study was to investigate the effect of a vegetarian diet on oxalate excretion in the urine of healthv subjects.