Under the influence of stress and unfavorable environmental factors, cell renewal slows down and the quality of the skin deteriorates. From the age of 30 , the complexion loses its brightness, the pores become more visible, and the skin looks less smooth. From the age of 40 , the complexion loses its uniformity, the first wrinkles appear, and the skin becomes less elastic. From the age of 50 , the skin loses its elasticity, wrinkles deepen, the complexion becomes uneven.