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1.
Article in Japanese | WPRIM | ID: wpr-372905

ABSTRACT

We investigated the effects of hot spring water drinking in Kawayu on blood glucose levels and insulin secretions. Kawayu hot spring water is characterized “acid alum vitriol hydrogensulfide” with a pH of 1.98. First, a glucose tolerance test (GTT) was performed on eight non-diabetic people and nine diabetic patients after drinking of tap water or Kawayu hot spring water at a one-week interval. Plasma glucose levels after pre-drinking spring water showed significantly (p=0.05) decreasing compared with those after pre-drinking tap water. Serum immunoreactive insulin (IRI) levels after predrinking hot spring water were tend to be higher at the early phase of GTT than those after pre-drinking tap water. And, we confirmed the correlation between the total decreasing of blood glucose levels and the reactions of insulin secretion at early phase of GTT after spring water drinking. Second, GTT was performed on seven diabetic patients before and after four-week drinking of Kawayu hot spring water. The results showed that hemoglobin A1c levels and total cholesterol levels ware decreased significantly (p<0.05). Total blood glucose levels of tested GTT were, however, almost similar before and after drinking treatment. These findings suggest that drinking of Kawayu hot spring water is beneficial for diabetic patients.

2.
Article in English | WPRIM | ID: wpr-372899

ABSTRACT

Drinking of hot spring water containing sulfur or sodium bicarbonate is reported to be beneficial for diabetic patients. In the present study, sulfur spring water and water from simple thermals were chosen to examine their effects on glucose metabolism. Eleven volunteers including eight type 2 diabetic patients and three healthy subjects drank hot spring water from Kawayu Onsen (K-O, acid alum vitriol hydrogen-sulfide springs, pH1.98), and another six patients from Asukano-yu (A-Y, alkaline simple thermals, pH8.9). Oral glucose tolerance test (OGTT) was performed after drinking tap water (200<i>ml</i>) or K-O spring water (5 times diluted) at a week interval (short term effect). Increments in plasma glucose levels were significantly lower (p<0.05) with predrinking of spring water than those with pre-drinking of tap water. To know the long term effect of drinking, patients drank K-O water twice daily for 4 weeks or A-Y water twice daily for a week. Hemoglobin A<sub>1C</sub> levels decreased significantly (p<0.05) by drinking K-O water and the levels of 1.5-Anhydro-D-glucitol increased by A-Y water (NS). From these findings, it is suggested that drinking hot spring water from K-O and A-Y is beneficial for diabetic patients if they have no contraindications for drinking these kinds of spring water.

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