| 1. |
The incidence of milk intolerance is approximately 19% in Japanese adults when 200 ml of milk is given. However, a much greater
incidence was assumed when considered under the criteria of Western standard.
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| 2. |
The lactase activity was significantly greater in milk drinkers than non-drinkers. And, internation ally, the activity is
higher in those nationalities whose milk consumption is greater.
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| 3. |
Lactase is an adaptive enzyme and rather easily induced by lactose load feeding in animals. From the data of our own and of
the literature, it was further confirmed that environmental factors play a more important role than genetic factors in the
etio-pathogenesis of milk intolerance.
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Key words milk intolerance - primary adult hypolactasia - disaccharidase - lactase - lactose load feeding