ALKALINE TIDES 1

Abstract

Measurements were made of the spontaneous morning excretion of alkali in normal resting individuals. This so-called morning alkaline tide persisted throughout the day. It was inhibited temporarily by light exercise and by the ingestion of food. Soda or orange juice taken the night before produced a larger alkaline tide, with little effect on acid excretion during the intervening night period. Diurnal variations in the excretion of free acid and alkali may result from varying discharge into the blood stream of alkali temporarily held in the liver.