Jeroean Dagavos, from campaign looking to rid the sea of plastic, has said the study showing microplastic in human waste was “worrying”.
Mr Dagavos, Head of Programs at Plastic Soup told talkRADIO’s Matthew Wright: “Plastics should not be in our bodies and it is there – so, the big question is ‘What does it do? And how can we avoid plastic entering our bodies?’”
He added: “Microplastic is in the air, right now whilst we are speaking we are breathing in plastic. I have no doubt about it.
When asked about how to avoid it, Mr Dagavos said some are easier than others.
He said: “It is worrying. What are the sources and how can we avoid it?
“Some sources are actually quite easy to tackle, like in your toothpaste or in your shampoo. You can get it out and you don’t need any plastic in it.
“Others are difficult like the microfibers from your clothes.
“Nine million fibres every wash you do.”
'It is impossible to live plastic free'
Mr Dagavos added: “It is impossible to live plastic free and I don’t think it is even necessary to go completely plastic free.
“But, you can look into the biggest sources.”
This comes as a study found evidence of microscopic plastic particles in human waste from around the world.
In every sample, scientists found tiny particles of up to nine different types of plastic.
Experts believe that plastic in the gut could suppress the immune system and aid harmful viruses.
'Microplastics inside humans'
Lead researcher Dr Philipp Schwabi, from the Medical University of Vienna in Austria, said: "Of particular concern is what this means to us, and especially patients with gastrointestinal diseases.
"While the highest plastic concentrations in animal studies have been found in the gut, the smallest microplastic particles are capable of entering the blood stream, lymphatic system and may even reach the liver.
"Now that we have first evidence for microplastics inside humans, we need further research to understand what this means for human health."
The pilot study recruited eight participants from the UK, Finland, Italy, the Netherlands, Poland, Russia and Austria.
Each person kept a food diary for a week before having their stools samples.