How do you increase eumelanin in hair?

Increasing eumelanin in hair naturally is challenging, as melanin production is primarily determined by genetics. However, certain nutrients can support overall hair health and potentially enhance melanin production. Consuming foods rich in vitamins B, C, and E, along with minerals like copper and zinc, may help. Additionally, avoiding excessive sun exposure and using hair products that protect against UV damage can help maintain existing eumelanin levels.