PROMOTION OF GASTRIC JUICE SECRETION
It was reported that soy sauce promotes gastric juice secretion
in humans (5). A clear soup containing 25 ml of soy
sauce in 300 ml of hot water was given to each of 15 people
and the amount of gastric juice secreted was measured. The
average amount of secreted gastric juice was 46.8 ml, which
was almost the same as that (44.0 ml) in the positive control
given Katsch–Kalk’s caffeine solution (0.07% caffeine solution),
which is a commonly used in inducing gastric juice
secretion. In chemical soy sauce, the average secretion
amount was 33.4 ml in the same people. Therefore, it seems