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腸道菌群失衡恐影響體重、性早熟!醫教你挑選益生菌 這些細菌與肥胖有關

Enews新聞網
2025/06/03 | 2分鐘閱讀

在現代社會中,肥胖和性早熟成為兒童健康的兩大隱憂。國泰綜合醫院兒童醫學部主任級醫師侯家瑋指出,這些問題可能與腸道中的微生物群落有密切關聯。腸道菌群的平衡與否,不僅影響著兒童的體重,還可能對其性成熟的時間產生影響。

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▲ 肥胖和性早熟成為兒童健康的兩大隱憂,如何挑選益生菌?(圖/shutterstock)

腸道菌群與肥胖的關聯

肥胖不僅僅是由於基因和生活方式造成的,研究顯示,腸道中的特定微生物群落也可能是肥胖的推手。肥胖者的腸道中,厚壁菌門(Firmicutes)的比例較高,而擬桿菌門(Bacteroidetes)的比例則顯著降低。這種菌群失衡會導致代謝紊亂,促進脂肪的吸收和儲存。相反,擬桿菌門能夠發酵膳食纖維,產生短鏈脂肪酸,這些物質有助於降低食慾和抑制脂肪儲存。

益生菌的角色

益生菌被認為是維持腸道健康的重要因素。世界衛生組織將益生菌定義為「適量給予宿主,使其能產生健康效應的活菌」。常見的益生菌包括比菲德氏菌、布拉酵母菌和嗜酸乳桿菌等。這些益生菌能夠在腸道中存活並繁殖,幫助維持腸道菌群的平衡,從而可能減少肥胖的風險。

腸道菌群與性早熟

腸道菌群不僅影響體重,還可能通過腸腦軸(gut-brain axis)影響性成熟的時間。高脂飲食會改變腸道菌群,進而影響下視丘-腦下垂體-生殖腺主軸(HPG軸)的活性,導致性早熟。研究發現,某些細菌如脫硫弧菌、毛梭菌等,與性激素的增加有關,這可能是性早熟的誘因。

如何選擇益生菌

市場上益生菌產品種類繁多,選擇適合的產品至關重要。侯家瑋醫師建議,選擇益生菌時應考慮其菌種、劑量以及產品的科學依據。適量攝取益生菌不僅能改善腸道健康,還可能對兒童的整體健康產生積極影響。

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