Hair loss reduces prostate cancer risk in men

London, March 18 (IANS) Men who are facing a future with less hair should stop fretting at the retreating hairline, as a recent study suggests hair loss "almost halves the risk of prostate cancer".

Men who start going bald at a young age are up to 45 percent less likely to fall victim to prostate cancer later in life, scientists have found, reports dailymail.co.uk.

Although half of all men suffer significant hair loss by the age of 50, an American team has linked the high levels of testosterone in those who go bald earlier to a lower risk of tumours.

The scientists studied 2,000 men aged between 40 and 47, half of whom had suffered prostate cancer. They compared the rate of tumours in those who remembered their hair thinning by the age of 30 with those who did not suffer hair loss.

Men who had started to develop bald spots on the top of their heads as well as receding hairlines had the least risk of cancer.

Hair loss is a source of concern for many young men, with surveys showing nearly half think going bald makes them feel old and less attractive, while three out of four have self-esteem problems.

The positive findings published in the journal Cancer Epidemiology would be controversial as previous smaller studies have suggested hair loss increases the risk of cancer.

Most baldness is caused when hair follicles, the tiny sacs in the scalp from which hair grows, become exposed to too much dihydrotestosterone, or DHT.

This is a chemical produced by the male hormone testosterone. If there is too much DHT circulating in the blood, the follicles shrink, so the hair becomes thinner and grows for less time than normal.

Experts believe men with high levels of testosterone are more likely to lose their hair, especially if baldness already runs in the family.

Those diagnosed with prostate cancer are often given drugs to reduce testosterone levels because the hormone can accelerate the growth of some tumours once they develop. But the latest research suggests being exposed to high levels of testosterone from a young age might actually help to protect against the disease.

"At first, the findings were surprising," said professor Jonathan Wright, an expert in prostate cancer at the University of Washington School of Medicine in Seattle. "But we found that early onset baldness was associated with a 29 percent to 45 percent reduction in their relative risk of prostate cancer."

Helen Rippon, head of research management at The Prostate Cancer Charity, added: "If these results are correct, they could be useful in providing us with a greater understanding of how testosterone behaves in the body and how it can affect different tissues."