人到老年时期后,在脸、手、背、前胸等处的皮肤上出现数量和面积大小不等的褐色斑块,人们称之为“老年斑”。老年斑不仅在皮肤表面出现,也可以在血管、心、肝、肾、脑等组织内累积。老年斑出现是衰老与疾病的表现。 老年斑形成的原因,是人体在代谢过程中,会产生一种叫作“自由基”,又称“游离基”的物质脂褐色素,即老年斑。自由基是体内代谢的必然产物,既有有利的一面,也有危害的 When people reach old age, brown patches of varying sizes and sizes appear on the skin of the face, hands, back, chest, etc., which people call “senile plaques.” Age spots not only appear on the skin surface, but also in blood vessels, heart, liver, kidney, brain and other tissues. Age spots are signs of aging and disease. The reason for the formation of senile plaques is that the human body produces a substance called “free radical”, also known as “free radical”, which is called the senile plaque in the metabolic process. Free radicals are the inevitable product of the body metabolism, both beneficial and harmful