As experts estimated that around 20 percent of the working population in well-off nations work night shifts, a theory implies that graveyard shifts might raise people's cancer threat. The idea originally dismissed as "wacky" is now receiving massive recognition.

The International Agency for Research on Cancer, the World Health Organization's back-up for cancer, will categorize shift work as a "probable" carcinogen by December

Researchers say that test results for prostate cancer among overweight men may be distorted by obesity. The results were released after studying data from over 14,000 patients who underwent the Prostate Specific Antigen (PSA) test, which is known to be unreliable.

According to Dr. Stephen Freedland, urologist at the Duke University Prostate Center, "We've known for a while that obese men tend to have lower PSA scores than normal weight men, but our study really proposes a reason why this happens and points to a need for an adjustment in the way we interpret PSA scores to take body weight into account

To determine yet another harmful effect of obesity on our health, an American study has found that obese men diagnosed with prostate cancer are twice as likely as healthy weight men to die from the disease.

It's not clear if losing weight would help patients after they're diagnosed with the disease but the study found that the overweight and obese patients were about 1.8 times as likely to die of prostate cancer as men of normal weight

Vitamins do not reduce cancer risk and heart disease, but exercise may be able to do what supplements can't. Exercise is proven to achieve the benefits claimed for vitamins, even for people who eat properly, reports the November 2007 issue of Harvard Men's Health Watch.

"Current evidence suggests that exercise may be a crucial weapon in reducing the risk of some cancers," the report claimed. "Studies show that active people are less likely to develop colon cancer than sedentary individuals, and that women who exercise can reduce their breast cancer risk

Men with 'low risk' prostate cancer, who miss more than two radiation treatment appointments, face greater risk of the cancer returning than those in high or intermediate categories, according to a new study.

Researchers at Fox Chase Cancer Center in Philadelphia analyzed data from around 1,800 patients over a period of 15 years