A continued presentation of the chemical bisphenol A (BPA) can lower testosterone levels in men, according to another study from China.

In the study, men who were presented with BPA on the grounds that they had worked in a compound plant for six months in any case had lower blood testosterone levels and those who worked in a tap industrial plant had lower testosterone levels.

In particular, workers in compound plants had a reduced level of “free” testosterone, which is the structure that is believed to have the best effect on the body. (Most of the testosterone in the body is not “free”, but bound to a protein)

The discoveries provide much more evidence that BPA can alter sex hormone levels in men, said study specialist Dr De-Kun Li, a senior exploration researcher with Kaiser Permanente’s research department in Oakland, California.

Previous research, which was also directed at Chinese assembly line workers, recommended that BPA lowers sperm levels and increases the risk of sexual brokenness in men – effects on well-being that are to some extent controlled by sex hormones.

BPA is like the female hormone oestrogen, which means it could have consequences for the human body. The effects of BPA on men might be quicker and easier to identify than the effects on women, because men have low oestrogen levels regardless, said Li. [See Is BPA really a health risk?]

However, regardless of whether comparative effects would occur in all people with lower levels of introduction, it is not known and should be further concentrated. BPA is present in certain plastics, canned foods and other food bundles, and a large number of people in the US have the compound in their piss.

Heather Patisaul, a partner teacher at North Carolina State University who is considering the effects of BPA, noted that the study looked at BPA in the blood rather than in the piss. Blood BPA levels are thought to account for a superior proportion of the continued introduction of BPA into the synthetic material, but are often low and could be affected by natural contamination, Patisaul said.

Men who are not in a substance processing plant, are likely to have BPA levels in their blood that are too low to even think about detection, Patisaul said. In the investigation, around 70% of the men working in the synthetic plant had distinguishable levels of BPA in their blood, while this was similar for 5% of the people working in the water production line.

“This information should not trigger warnings for men who do not work in synthetic plants,” said Patisaul.

Patisaul said that the new study was little and did not excellently help to show contrasts in hormone levels, possibly due to the hours of daylight accumulated.

The study was distributed online on 6 May in the Fertility and Sterility diary.

Pass it on: Exposure to BPA in the working environment is associated with lowering testosterone levels in men.

This story was given by MyHealthNewsDaily, a sister site of LiveScience. Follow Rachael Rettner @RachaelRettner Follow MyHealthNewsDaily @MyHealth_MHND, Facebook and Google+. Originally distributed on MyHealthNewsDaily.