It's supposed to be a mark of distinction, but going grey is now the top concern for British men, according to new research.

头发颜色原本只是区分年龄的一个标志，然而一项最新调查显示，对于英国男性来说，头发变白是他们最关心的问题。

Hair color is the number one appearance concern for men today, with more than half of British men worrying about graying hair, and 45 marks the age when panic really sets in, according to a poll from market research firm Mintel.

"Although grey hair is traditionally seen as a mark of distinction in men, the reality is many men are unhappy with their newfound gravitas（庄严，庄重） ," Mintel Head of Beauty Research Vivienne Rudd said in a statement.

"The physical changes associated with aging can act as a catalyst¹ to mid-life crisis and our research has discovered that men become less content with their appearance after the age of 45."

Hair loss or thinning, is the second most common concern, worrying 40 percent of the respondents to the Mintel survey of 2,000 British men.

Unwanted hair (in the nose and ears) preoccupied² 38 percent of respondents, being overweight bothered 37 percent and 30 percent were worried about yellowing teeth.

Mintel said that men appeared to be more accepting than women when it came to their appearance, but found that at 45 years of age, men become increasingly less happy with their looks.

More than a quarter of men aged³ 45-54 dislike four aspects of their appearance compared to an average of just over one in 10 men overall.

Rudd said that delayed retirement⁴ and working later into life than their parents did as the British population ages will bring older men into competition with younger colleagues.

"As a result, older people may feel the need to try to maintain appearance and therefore bring a future boost to the male grooming⁵（修饰，仪容整洁） market," she said.