抄録
米飯食は伝統的な日本型食生活の中心であり,日本食は肥満や糖尿病食として推奨されている.米飯食が血糖コントロールの面から良い食品であるかをパン食と比較検討した.被験者は19〜20歳の健常な女性35名で,被験食品(約350kcal)を10分間で摂取させた.空腹時,食後30分,60分,90分,120分の計5回指先より採血し血糖測定器で測定した.その結果,空腹時血糖値は全員110mg/dL未満で耐糖能異常者はいなかった.食後60分,90分,120分の来飯食の血糖値がパン食より有意に高かった.また,体脂肪率30%以上の被験者ではパン食と米飯食間での有意差はなく,30%未満では食後60分,90分,120分の米飯食の血糖値がパン食より有意に高かった.米飯食で比較すると体脂肪30%未満が30%以上に比べて食後30分値が有意に高かったが,パン食では有意差はなかった.体脂肪率30%以上の人には内臓脂肪によるインスリン抵抗性が惹起しているのではないかと考えられる.
Rice is a staple Japanese traditional food, and Japanese foods are recommended to prevent obesity and diabetes. To clarify whether or not rice is a good food from the aspect of controlling the blood glucose level, rice was compared with bread. The subjects were 35 healthy females aged 19 - 20. They consumed a test food (about 350kca1) for 10 minutes. Blood samples were collected from their finger tips five times in total, ; while fasting, and 30, 60, 90, and 120 minutes after the meal. Samples were measured by a blood glucose meter. The results showed less than 110mg/dL of the blood glucose level while fasting in all subjects, indicating no abnormal glucose tolerance. The blood glucose levels at 60, 90 and 120 minutes after rice meals were significantly higher than those after bread meals. No significant difference between bread and rice was found in the subjects with body fat percentage of 30% or higher. Blood glucose levels at 60, 90, and 120 minutes after rice meals were significantly higher in subjects with less than 30% fat. Only subjects who ate a rice meal being compared, the subjects with less than 30% fat showed significantly higher levels at 30 minutes after a meal in contrast to the subjects with 30% or higher fat, but no such significant difference was found with bread. It was speculated that insulin resistance might be induced by the visceral fat in subjects with body fat percentage of 30% or higher.
