Sperm counts in men have been falling for decades and 40% of low counts remain unexplained, although chemical pollution has been implicated by many studies.
The 40 semen samples were from healthy men undergoing premarital health assessments in Jinan, China. Another recent study found microplastics in the semen of six out of 10 healthy young men in Italy, and another study in China found the pollutants in half of 25 samples.
Recent studies in mice have reported that microplastics reduced sperm count and caused abnormalities and hormone disruption.
Research on microplastics and human health is moving quickly and scientists appear to be finding the contaminants everywhere. The pollutants were found in all 23 human testicle samples tested in a study published in May.
Microplastics have also recently been discovered in human blood, placentas and breast milk, indicating widespread contamination of people’s bodies. The impact on health is as yet unknown but microplastics have been shown to cause damage to human cells in the laboratory.
Millions of tonnes of plastic waste are dumped in the environment and much is broken down into microplastics. These have polluted the entire planet, from the summit of Mount Everest to the deepest oceans. People are known to consume the tiny particles via food and water as well as breathing them in.
Source: www.theguardian.com
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