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形成衰老的原因是什麽? 1、自然老化:隨著年齡的增長,新陳代謝減慢,皮膚松弛、老化。
2、光老化:人類生活在地球上受到陽光的照射,紫外線的照射使皮膚發紅、發黑、形成黑斑。
3、動力性皺紋:人的面部表情豐富造成面部表情紋。
4、地心引力性老化:由于地心引力造成身體各部位老化下垂,表現爲衰老。
5、分泌紊亂性老化:由于雌雄激素的作用,男女進入更年期後,體內激素分泌減少,造成更年期綜合症。從而精神不振,皮膚暗淡無光,頭發枯燥,脫落。
6、基因型老化:遺傳基因決定有的人老化的快,有的人老化的慢。