(CBS News) In a new study, German researchers took a group of overweight men and restored their normal testosterone levels. The group lost weight, lowered their blood pressure, and improved their cholesterol. The study looked at 115 obese men aged between 38-83 years with low testosterone levels, the BBC reports. Subjects were injected with the hormone every 2 weeks to increase levels. The research was paid for by Bayer Pharma, a manufacturer of testosterone replacement therapy. The study found no increased risk of prostate cancer.