Researchers found that working long hours could double the chances of baldness, according to the Daily Mail.
The men, who worked more than 52 hours a week, lost hair twice as fast as those who spent less than 40 hours at work, the scientists said.
Scientists say the stress caused by too much work is probably the main cause of baldness.
The research, which examined more than 13,000 working men, is believed to be the first of its kind to specifically address the impact of long working hours on hair loss.
A change in hormone levels during stressful workout can result in negative changes in many areas of the body.
When levels of these extra hormones rise, they can inhibit the growth of hair follicles on the scalp, according to the report.
Previous studies have shown that stress causes the immune system to attack these follicles, for reasons not yet known.
It is also believed that stress leads to premature hair entering the "catagen" phase, or "resting phase", the end of active hair growth.
The academics behind the study urged lawmakers to limit the number of hours employees can work.
Researchers from the Songkyunkwan University School of Medicine in Seoul, South Korea, followed 13,391 men aged 20 to 59 between 2013 and 2017.
"The results of this study show that long working hours are largely associated with an increase in the chances of baldness or alopecia in male workers," said lead author Kyung Hun-sun.
"Reducing long working hours may be the solution to preventing the development of alopecia in young workers, especially those in their twenties and thirties, where hair loss symptoms begin to appear."