Why People with Red Hair Have a Higher Risk of Skin Cancer
According to the Canadian Cancer Society, approximately 7,200 Canadians were diagnosed with melanoma skin cancer in 2017. Here's why people with red hair have a higher risk.
What is melanin?
Melanin is a pigment that special cells produce, according to Megan Winner, MD, a surgical oncologist with expertise in melanoma skin cancer from the NYU Winthrop Hospital. The melanin pigment absorbs light hitting the skin, dissipating the ultraviolet (UV) radiation from the sun before causing damage, Dr. Winner says. So it acts as the body’s natural defense against the harmful rays of the sun. “Exposure to UV radiation can directly harm the DNA of a skin cell, resulting in changes in the cell’s behaviour that ultimately lead to the transformation of a normal cell into cancer,” she says. (Here are 15 skin cancer myths you need to stop believing right now.)
Why do people with red hair have a higher risk of melanoma?
People with lighter skin tone, particularly those with red hair, have lower levels of natural melanin protection and thus higher rates of melanoma, Dr. Winner says. The amount and type of melanin in our skin actually helps determine skin colour, according to Shari Lipner, MD, a dermatologist at NewYork-Presbyterian and Weill Cornell Medicine. This same pigment determines hair colour, too. Pheomelanin is the dominant, lighter pigment in people with red hair, while people with darker hair make the eumelanin pigment. These pigments are essentially why some people “tan” while others “burn” after sunlight damages the skin. Check out the five reasons your sunscreen isn’t working.
New research could make a difference
Recent research could make a big difference in decreasing the risk of melanoma in redheads. People with red hair have variants in the melanocortin-1 receptor protein, causing their light skin color, according to Dr. Lipner. The study showed mice given a small increase in palmitoylation, enhancing the melanocortin-1 receptor protection, were less likely to get melanoma than those who did not, Dr. Lipner explains. This research uses mouse models, however, and needs more work before applying the findings to humans, Dr. Winner notes. Plus, the body’s natural melanin alone is not enough to prevent skin cancer even in darker-skinned people, Dr. Winner says. So even if this research does eventually apply to people, you should never skimp on SPF.
In fact, people of all skin and hair colours can still decrease their risk of developing skin cancer by avoiding the sun during peak hours, regularly applying sunscreen, avoiding tanning beds, wearing protective clothing, and visiting a board-certified dermatologist for any concerning or changing spots on your skin.
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