There are multiple mechanisms at play in skin aging, with the sun being one of the most important causes of skin aging. Some studies have found that sunscreens can prevent skin aging. Sunlight and Skin Aging There are many causes of skin aging, but sunlight is the most important factor. Over 90% of wrinkles and almost 100% of pigmentation changes in the skin are caused by the sun. Children’s skin is very soft and supple because it is rich in collagen and elastic fibers. However, as we age, the skin gradually shows signs of aging, such as wrinkles, sagging, and loss of elasticity. The aging process of the skin cannot be changed. Nowadays, there are many treatments such as photon and Botox that can slow down the aging process of the skin, but they cannot fundamentally reverse the aging process of the skin. Skin aging can be traced back to the beginning of skin discoloration. Of course, this is far-fetched or not supported by research as evidence of skin aging, but if we compare it with the texture and elasticity of children’s skin, we can see the difference. This discoloration is mostly caused by the sun, or the sun plays an important role in the formation of discoloration. Sun-induced skin damage usually begins to appear in the 20s and 30s. When in the 40s and 50s, subcutaneous fat depletion occurs and the skin thins. Collagen fibers are further destroyed and the skin loses elasticity and becomes loose. This is more severe in people who work outdoors for long periods of time. In the sixties and seventies, more pigmentation and age spots will appear on the face, and the aging of the skin will become more serious. If you reach 80 or 90, it will be even more serious. Of course, there are many reasons for skin aging, and skin aging is also part of the overall aging process of the body. But sunlight also plays an important role in skin aging. It is generally the UV rays of the sun that cause DNA damage to skin cells. When young, the skin repairs this damage, but this repair mechanism gradually decreases with age. Therefore, continuous exposure to sunlight leads to an eventual failure to repair this damage, resulting in the destruction of collagen and elastic fibers, loss of elasticity and loosening of the skin, and the appearance of various discolorations on the surface. In severe cases, it causes skin cells to start mutating, causing skin cancer. Prevention methods As mentioned above, sunlight does play an important role in skin aging. But again, we cannot avoid sunlight exposure. Therefore, it is more important how to prevent or slow down the sun-induced skin aging. Daily use of sunscreen can prevent or slow down skin aging. Therefore, the daily use of sunscreen by middle-aged people is a good preventive method to prevent skin aging. If you are an outdoor worker, it is even more important to use sunscreen.