While the study concluded that the average age for a woman to go grey is 33, it found redheads lose their colour at 30, brunettes at 32 and blondes at 35. For one in 10 women, those first grey hairs appear by the time they reach 21-years-old, while one in four women find their first grey by the age of 25.

What is the average age to go grey?

The age at which your hair turns grey varies a lot per person. There are people who get their first grey hairs in their twenties, and others that only start greying in their fifties. However, the average age that people turn grey is around when they're 30 or 35 years old.

At what age does brown hair turn grey?

Your hair follicles produce less color as they age, so when hair goes through its natural cycle of dying and being regenerated, it's more likely to grow in as gray beginning after age 35.