Grey hair may not only indicate aging. Recent research shows it could signal your body fighting melanoma, the deadliest skin cancer.
Researchers reported that pigment-producing cells in hair follicles, called melanocyte stem cells, exit the body when damaged. Consequently, these cells do not divide and potentially form tumors.“
If melanocyte stem cells continue dividing, they could contribute to tumor formation,” explained Yasuaki Mohri, lead study author. The study, published in Nature Cell Biology in October 2025, examined rodents exposed to cancer-causing substances. Scientists found cells either left the system, producing grey hair, or kept dividing, which increased cancer risk.
Mohri highlighted that this process acts as a natural defense against melanoma, removing potentially dangerous cells from hair follicles.However, experts warn that grey hair does not guarantee immunity. Dermatologist Ife J. Rodney explained, “Other factors, such as sun exposure and family history, still affect melanoma risk.”
Similarly, Gary Goldenberg, assistant clinical professor at Mount Sinai, noted, “Grey hair doesn’t mean you’re safe. Many still develop melanoma.”
Risk factors include frequent sunburn, tanning bed use, light skin, and family history. Experts stress strict sun protection, including sunscreen, hats, and limiting peak sun exposure. Rodney emphasized, “Grey hair shouldn’t predict melanoma risk. Sun protection remains essential, and further human studies are needed.”
In conclusion, grey hair may reflect a protective mechanism against melanoma, but proper sun care is still critical.
