First: related to the heritage.
Generally, girls in adolescence have pink nipples. There are also some women who are affected by their own skin, and the amount of melanin increases to form nipple blackening.
Second: it is formed by melanin factors in the later stage.
With the increase of age, the secretion of hormones in the body changes, and the nipple will change from pink to black.
1, pregnancy, abortion, childbirth: The areola color of movies and TV shows is deepened by estrogen and progesterone.
2. Sexual life stimulates hormone metabolism in the body to form black.
Methods of preventing melanin precipitation
Since ancient times, pink has given people a sense of shyness. Most men and women like pink and smooth colors. Can cause more visual effects and nerves in men. If you care about your color, you can use luxury lycopene and pay more attention to maintenance. I want to know more here.