Grey Hair Melanoma study suggests pigment loss may lower skin cancer risk, though sun protection remains essential for overall safety

Grey Hair Melanoma may signal more than ageing, according to a new study indicating that pigment loss could help the body defend against melanoma, the deadliest form of skin cancer.

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Researchers at The University of Tokyo found that melanocyte stem cells in hair follicles, responsible for pigment production, exit the body when damaged rather than dividing.

This process, while causing grey hair, prevents cells from multiplying and potentially forming tumours.

“While grey hair develops, the risk of melanoma simultaneously decreases,” said lead author Yasuaki Mohri. The study, published in October 2025 in Nature Cell Biology, observed melanocyte stem cells in rodents exposed to cancer-causing substances, revealing this protective mechanism.

Experts caution, however, that grey hair does not guarantee immunity from melanoma. Dermatologist Ife J. Rodney noted, “When these cells are gone, you get grey hair, but other factors still influence melanoma risk.”

Gary Goldenberg, assistant clinical professor at Mount Sinai, added, “Having grey hair doesn’t mean you’re immune. Many patients with silver strands still develop melanoma.”

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Risk factors include sunburn, chronic sun exposure, light skin, family history, and tanning bed use. Doctors emphasise strict sun protection, with Rodney advising, “Grey hair shouldn’t be used to predict your melanoma risk or change your behaviour. Sunscreen is still essential.”