食物繊維と腸内微生物群:グルコースホメオスタシスの影響
Jennifer E Pugh1, Edward S Chambers
1Section of Nutrition, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, UK.
Current opinion in clinical nutrition and metabolic care
|September 1, 2025
まとめ
食物繊維は血糖のコントロールと腸の健康を改善しますが,効果は様々です. 腸内バリアの整体性と炎症マーカーは,腸内微生物群の変化よりも有益な指標です. 健康な個体でのさらなる研究が推奨されます.
科学分野:
- 栄養学
- 微生物群の研究
- 代謝 健康
背景:
- 食物繊維の摂取量は,血糖制御と慢性疾患の予防に役立つことが知られているにもかかわらず,世界的に最適ではありません.
- 繊維が健康に与える影響を媒介する腸内微生物群の役割は 科学的に関心が高まっている分野です
- 繊維の健康上の利点を最適化するには 微生物群に依存するメカニズムを理解することが重要です
研究 の 目的:
- 食物繊維に関する最近のヒト介入試験をレビューする.
- 食物繊維が微生物群に依存するメカニズムを通してグルコースの恒常性を改善するかどうかを評価する.
- 繊維の種類,用量,集団の影響を評価する.
主な方法:
- 最近の9件のランダム化対照試験 (RCT) の体系的レビュー
- 分析は,血糖マーカー (断食グルコース,インスリン,HOMA- IR) と腸内微生物の組成に焦点を当てた.
- 腸壁の整体性と全身性炎症マーカーを評価する研究を含める.
主要な成果:
- 5つのRCTでは,血糖制御マーカーの改善が報告されました.
- 腸内微生物群の反応 (多様性,組成) は,研究ごとに不一致であった.
- 腸壁の整体性と全身性炎症マーカーの一貫した改善が観察されました.
結論:
- 食物繊維は血糖制御を強化し,腸内微生物群を調節することができますが,結果は変動します.
- 腸壁の整体性と炎症マーカーは 繊維の効能を 微生物の成分よりもよく示す指標です
- 将来の研究は,健康な集団に焦点を当てて,代謝の健康維持における繊維の役割を理解する必要があります.
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