Our skin consists of three layers:
1. Subcutaneous tissue: The inner most layer. The tissue in the subcutaneous layer contains fat cells, which insulate the body.
2. Dermis : The middle layer. The dermis contains the connective tissues.
3. Epidermis : The outermost layer of skin. The purpose of the epidermis is to protect the inner skin from environmental contaminants.
Cells in the epidermis continuously travel from the inner most part of the epidermis to the surface, flaking off once they reach the top. The cells in the epidermis become thinner over time. Less collagen is produced causing skin to lose its elasticity, causing the skin to sag and wrinkle. The number of sweat glands also decreases over time leading to dryer skin. As people age, cells in the subcutaneous layer become smaller also contributing to the sagging and wrinkling. UVA and UVB radiation from sunlight thin the epidermis even more. They also contribute to a faster breakdown of collagen in the dermis.
Therefore we need good skin care to slow down the harmful effects of time and the environment. We should follow a regime of cleaning and moisturizing, drink enough water, avoid smoking and exposure to the sun, and last but not least, eat healthy diet. In order to reduce or slow the process of aging, we can use skin care products available in the market. One thing to be kept in mind is that just like in buying cosmetics and other beauty products, is to always look for skin care products that are suitable for your skin type and activity. You can visit ShopWiki, the most complete collections of buying information on the Web which features more than 1,000 buying guides.