Healthy skin should have good cell regeneration function. However, this function will decline with age. At this time, we need to use skin care products to help the skin. The protective effect of melanin on the skin and the generation of pigmentation. Between the basal cells are sparsely scattered another type of cells, the melanocytes. The color of normal skin is related to the content of melanocytes, which prevent UV rays from penetrating the skin and damaging deep tissues. Darkening of the skin after sun exposure is due to an increase in melanin to strengthen the skin's resistance to sunlight. However, after the production of melanin, due to the unsmooth metabolism and the lack of proper maintenance, it is easy to produce pigmentation and form spots. Therefore, we can use Jelsys laser beauty machine and whitening products to help melanin metabolism and prevent pigmentation. (2) Dermis There is a reticular layer structure in the dermis, which is composed of collagen fibers and elastic fibers. The structure is loose, and they crisscross each other into a network structure. This mesh structure supports the skin, giving it good firmness and elasticity. With age, the fibers become brittle, and when broken, part of this network can collapse, causing the skin to wrinkle. This condition cannot be restored with skin care products, so when recommending use jelsys company RF machine , HIFU beauty machine , Thermage beauty machine etc.