Gray hair is not just a sign of aging: Study reveals its link to cancer-fighting mechanisms

Gray hair is not just a sign of aging: Study reveals its link to cancer-fighting mechanisms

Graying and hair loss have long been considered natural signs of aging, but a recent scientific study has revealed a deeper dimension to this phenomenon, indicating its connection to defense mechanisms the body employs to protect against the risk of developing cancer. The study, conducted by researchers from the University of Tokyo and published in the journal Nature Cell Biology, highlighted the role of stem cells in hair follicles in combating DNA damage. Hair color is determined by the pigment melanin, which is produced by specialized cells known as melanocytes. These cells originate from pigment stem cells found within hair follicles. Under normal conditions, these stem cells divide regularly with each hair growth cycle, allowing hair to maintain its color for extended periods. However, continuous exposure to harmful environmental factors, such as radiation, chemicals, and pollutants, can lead to DNA damage within these cells. As this damage accumulates over time, the stem cells en…