The digestive tract is one of your biggestimmune organs, so keep disease-causing germs out with probiotics andprebiotics, found in naturally fermented foods like yogurt.

• 消化道是最大的免疫组织所在器官之一，摄入酸奶等天然发酵食品中含有的益生菌和益生素，可以防止致病细菌的侵入。