抄録
In this study, changes in intake of fat, polyunsaturated fatty acid (PUFA), vitamin E (E) and E/ PUFA ratio (E/PUFA) were investigated on the basis of the data from the nutritional survey of Osaka citizens during the past 50 years. The total fat intake in Osaka citizens, which was less than 10% of total energy intake in 1946, increased by 5.5 fold during the past about 50 years. The increase in saturated fatty acids, mono-unsaturated fatty acids and PUFA were 6.3, 9,1 and 3.7 fold, respectively. The n-6/n-3 ratio was almost 4:1 throughout the period. E intake of 4.3mg/day in 1946 gradually increased during the next 30 years and reached the maximum of 8.7mg at 1975, which was maintained in the almost constant level for subsequent 20 years. However, the E/PUFA which is able to evaluate the E nutritional status, decreased from 1.07 in 1946 to 0.55 after 1994. If PUFA would be considered on the basis of its peroxidizability, E/PUFA-L fell less than 0.4 after 1965, the value of which continued to do till 1994. This finding should be taken into account on the evaluation of E requirement, although the total E intake recently increases to the recommended dose of 8mg as emphasized by the Japan Nutritional Requirement Council.
