一个人的头发枯荣,在一定程度上反映出人体的营养状况。除去生理性衰老引起头发的变化之外,一般认为头发浓密、乌黑、有光泽,说明营养状况良好;反之,头发稀疏、枯黄、无光泽,且大量脱发或折断,则是营养欠佳的表现。造成脱发的原因很多,尤其是属于季节性的因素,特别是夏季更应防脱发。 The dry hair of a person, to a certain extent, reflects the nutritional status of the human body. In addition to physiological aging caused hair changes, generally considered thick hair, black, shiny, indicating good nutritional status; the other hand, hair sparse, yellow, dull, and a large number of hair loss or broken, is the performance of poor nutrition. Cause hair loss for many reasons, especially the seasonal factors, especially in summer should prevent hair loss.