Washington (pte) – the most research in the past 25 years so far came to the conclusion that alcohol inhibits the secretion of the hormone testosterone in men. Researchers of the Scripps Research Institute claim according to a recent study the opposite. Under certain conditions, alcohol can trigger a jump in the hormone. Although the tests were carried out on rats, the team of Robert H. Purdy but believes to be able to interpret the increase in libido and aggression in drunkenness among people so. Researchers administered a dose of two grams of ethanol / kg body weight of rats in their study. A particular form was used out of alcohol, the so-called 1 1-dideuteroethanol. This alcohol, two hydrogen atoms on the carbon atom of the ethanol are replaced by deuterium atoms. The detection is performed by mass spectrometry, which is a very accurate method for measuring mass and structure of ingredients that are derived from tissues and liquid extracts. After 30 minutes, the testosterone level was measured in the so-called frontal cortex and in the blood plasma. The result: in the brain of rodents, the testosterone production rose by leaps and bounds to four times, in the blood three times, write the researchers in the current issue of alcoholism: clinical & experimental research. “The results of the direct link between alcohol consumption and the testosterone levels in the brain of these animals are not only with other studies, but also with the same working group at a different rat species contrary results,” Purdy said. According to Purdy was seen until now the assumption that alcohol reduced reproductive capacity, too little differentiated. At least temporarily, alcohol under certain conditions could spontaneously raise the testosterone levels in the blood and brain. This testosterone increase is but able, in some people temporarily bring a change in behavior such as an increased libido and aggression. The researchers want to further keep in mind the effect of alcohol on testosterone produced in the testes, ovaries and the adrenal cortex. Open questions are: lower quantities of alcohol to an acute increase of testosterone in run? With repeated dose, evolved a resistance? Is there a difference between the sexes? And finally: what role does a testosterone modified by alcohol use actually the behavior?