Why does old people grow wrinkles?

Aging process is the inevitable sign of aging, and aging process is also one of the main reasons for aging In aging skin, cell division slows down, endothelial layer becomes thinner and more vulnerable to damage Skin healing also slows down and becomes vulnerable The loss of deep tissue on the surface of the supporting skin leads to the loss of elasticity of the skin, so the skin will no longer recover its shape immediately after pressing Frequent smile or squint and other facial expressions will make the face appear crow's feet and smile lines Reducing the number of fat cells under the epidermis that keep the skin full will cause sagging and make wrinkles more obvious Atrophy of sweat glands and oil glands secreted by moisturizing will make the skin dry and lose protection In addition, gravity can cause the skin to fall Sun damage sun ultraviolet radiation can accelerate the aging process and cause skin damage and wrinkles Ultraviolet rays break down collagen and elastin, which give the skin elasticity and tenacity When collagen and elastin break down, the body compensates by producing a large amount of enzyme matrix metalloproteinases Metalloproteinases repair collagen to rebuild sun damaged skin However, metalloproteinases can also erode collagen and form disordered fibers, and repeated erosion can lead to wrinkles Another negative effect of the sun's ultraviolet rays is excessive oxidation Although oxidation is naturally produced by human body, when excessive, it will damage cells and stimulate the secretion of metalloproteinases, further degrading collagen and causing wrinkles The influence of lifestyle on some lifestyle will also accelerate the aging process Smoking alters the blood supply to the skin and produces oxidation, which in turn stimulates the production of metalloproteinases that damage collagen Exposure to ozone and other air pollution will consume the amount of antioxidant vitamin E Although losing weight helps improve overall health, it can cause wrinkles if you lose weight too quickly In addition, the loss of fat cells under the skin is too fast, it will also make the skin become dry and sagging.