There are collagen and elastin in the dermis of the skin, which support the skin and make it full and firm. But after the age of 25, these two kinds of protein naturally decrease due to the aging process of human body, and the fibers between cells deteriorate with time, making the skin lose elasticity. With the increase of age, the skin becomes slack. So after the age of 25, women must use the essence.

2. The second cause of skin relaxation: the supporting force of the skin decreases.

Fat and muscle are the biggest supporting forces of skin, and subcutaneous fat loss and muscle relaxation caused by aging, weight loss, unbalanced nutrition, lack of exercise and other reasons make the skin lose support and droop, which is also the main reason for skin relaxation.

3. The third cause of skin relaxation: the metabolic capacity of the skin decreases.

In fact, our skin has its own metabolic function, which can decompose aging damaged collagen and elastin, and at the same time, it can also produce new collagen and elastin to replace it, thus maintaining the richness and elasticity of the skin itself. However, the speed of these metabolism will gradually slow down with the aging of cells; The old can't be decomposed, and the new can't be made, which leads to the fragility, looseness and inelasticity of the dermis.

4. The fourth cause of skin relaxation: other factors.

For example, gravity, heredity, mental stress, sun exposure, smoking, etc. will also transform the skin structure, which will eventually make the skin lose its elasticity and cause skin relaxation.