The hormone that darkens skin is melanin. Melanin is produced by cells called melanocytes, which are found in the basal layer of the epidermis, the outermost layer of skin.
How Melanin Works
Melanin is a pigment that absorbs ultraviolet (UV) radiation from the sun. When skin is exposed to sunlight, melanocytes produce more melanin, which gives the skin a darker appearance. This process, called tanning, is the body's natural way to protect itself from the harmful effects of UV radiation.
Other Factors Affecting Skin Color
While melanin is the primary hormone responsible for skin color, other factors can also influence skin tone, including:
- Genetics: Your genes determine the amount of melanin your body produces.
- Age: Skin tends to become lighter with age.
- Hormonal changes: Hormonal fluctuations, such as those during pregnancy, can cause changes in skin pigmentation.
- Certain medications: Some medications can cause changes in skin color as a side effect.
Summary
In summary, melanin is the hormone that darkens skin. Melanin production is influenced by factors such as genetics, sun exposure, and hormonal changes.
