Abstract
The effect of diet on urinary citrate excretion was determined on 54 medical students. Citrates were measured by the method of Ettinger and co-workers. Citrate excretion in the human is increased by the ingestion of alkali and decreased by the ingestion of acid. The vitamin D content of the diet also affects the citrate excretion. The presence of physiological amounts of vitamin D in the diet appears to increase citrate excretion even on acid-producing diets such as high protein diets, or diets supplemented with ammonium chloride.