Effects of an exchange of 20 % of rice for barley in the diet for 3 weeks on their dark adaptation, urinary pyridoxic acid, a metabolite of vitamin B
6, pantothenic acid and adreno-corticoid (17-OHCS) were studied using 20 women aged 29-59 years in Iwate City and 25 women aged 32-65 years in Hanamaki City.
Survey of diet in Iwate City : Estimated nutrients per capita per day in this city were caloric intake 2, 429 kcal, protein 88 g, vitamin A 2, 361 IU, thiamin 1. 1 mg, riboflavin 1. 1 mg, vitamin B
6 2. 0 mg, pantothenic acid 5. 3 mg, ascorbic acid 95 mg. When 20 % of rice was exchanged for barley the amount of intake of vitamin B6 and pantothenic acid decreased to 1. 9 and 5. 2 mg respectively.
Survey of diet in Hanamaki City : Caloric intake 2, 069 kcal, protein 69 g, vitamin A 2, 145 IU, thiamin 0. 59 mg, riboflavin 1. 21 mg, vitamin B
6 2. 1 mg, pantothenic acid 4. 0 mg, ascorbic acid 95 mg.
The partially exchange of rice for barley improved the dark adaptation and increased the urinary pyridoxic acid in the experiment in Iwate City. The experiment in Hanamaki City showed an increase of urinary excretion of pantothenic acid and pyridoxic acid. This results might be due to the increase of these vitamins supply synthesized by intestinal microorganism with rice-barley diet. The decrease of urinary adreno-corticoid suggests that the alleviation of stress was-caused by the increased supply of these vitamins with rice-barley diet.
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