What causes hair colour to turn ginger?

Hair color can turn ginger due to a variety of factors, primarily genetics. The presence of the gene variant known as MC1R can lead to the production of pheomelanin, which gives hair a red or ginger hue. Additionally, changes in hormonal levels, environmental factors, or aging can also influence hair pigmentation, potentially leading to a shift in color. Temporary factors like sunlight exposure or dyeing can also contribute to a ginger appearance.