why does blonde hair turn brown?

Why is my hair changing from blonde to brown? At what age does blonde hair turn brown?

Blonde hair that begins to darken does so because a gene is no longer expressing as much as it used to. Genes control the amount and type of melanin produced. The amount of lighter melanin decreases and the hair appears darker as darker melanin is more prominent.

4 Reasons Why Your Hair Is Changing Colors Naturally

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