Journal
JOURNAL OF OLEO SCIENCE
Volume 66, Issue 5, Pages 507-519Publisher
JAPAN OIL CHEMISTS SOC
DOI: 10.5650/jos.ess16241
Keywords
Japanese diet; Mediterranean diet; Italian diet; lipid metabolism; 1975 Japanese diet
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Funding
- Integration research for agriculture and interdisciplinary fields, Ministry of Agriculture, Forestry and Fisheries of Japan
- Canon Foundation
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The Japanese diet and the Mediterranean diet are both known to be good for health, but there had been no direct comparison of their health benefits. In this study, we compared the 1975 Japanese diet, which has been found to have high health benefits, with the 2010 Italian diet, which contributes to the longest life expectancy in Mediterranean countries. Diets were created using one-week menus of the two diets based on FAOSTAT Food Balance Sheets. The diets were prepared, freeze-dried, powdered and fed to mice for 4 weeks to examine their effects on lipid metabolism. In mice fed the Japanese diet, the visceral fat weight was lower, adipocytes were smaller, the liver weight was lower and liver TG tended to be lower than those fed the Italian diet, and little lipid accumulation was observed in hepatocytes of mice fed the Japanese diet. In addition, in mice fed the Japanese diet, the expression levels of genes related to fatty acid synthesis were lower, whereas those of genes related to catabolism of fatty acids and cholesterol were higher than those fed the Italian diet. Therefore, the Japanese diet reduced accumulation of lipids in the white adipose tissue and liver by suppressing fatty acid synthesis and promoting catabolism of fatty acids and cholesterol in the liver, compared to the Italian diet.
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