The first part in this two part series established what microplastics are. In this second part we are looking at whether they are harmful to humans, and if so, should we be worried? Microplastics are very likely present in our bodies. Dr Dušan Materić of the Helmholtz Centre for Environmental Research says ‘We do have plastics in us … I think that is safe to assume’. Plastic is closely tied to our food and drink. Research by Retail Economics found that 70% of UK food packagin

Latest research shows that patients who suffer heart attacks have more micro and nanoplastics in their blood. When we talk about plastic and health, the conversation usually revolves around the stomach and digestion. But microplastics don't stay in the gut. Nanoplastics are small enough to pass through the lungs or gut into the bloodstream, where they can travel throughout the body, and they have been found in the blood vessels supplying the heart. The first big warning came

In January 2026, the Guardian reported that the ‘bombshell’ research paper claiming to have found microplastics in the human brain has been strongly refuted by academics, due to what they call insufficient ‘methodological’ precautions taken by the original research team to arrive at their conclusion. The article concluded, with interviews from experts, that the presence of microplastics in the human body is not fully proved, but according to some experts, very likely to be pr

“Take a deep breath. You have just inhaled two to eight microplastic particles”. That is how the All-Party Parliamentary Group (APPG) opens its new report on Microplastics. Microplastic pollution puts agricultural soil, food security, and human health at risk. The report finds that the UK still has no cohesive national strategy, no legally binding reduction targets, and no regulatory limits on the primary pathways through which microplastics enter our environment. Here is ho

Sustainable plastic solutions attempt to solve the plastic problem with innovation. Rather than reducing plastic production and use, ‘sustainable’ bioplastics have been developed, and better waste management processes have been proposed instead. Improved recycling collections have been suggested as a sustainable plastics solution. The more plastic that is appropriately collected, the more plastic gets recycled. However, a more complex system of collection may confuse or demot

Plastic pollution is usually pictured as something outside the body: bottles on beaches, fragments floating in oceans or waste accumulating in landfill. Increasingly, however, scientists are finding evidence of plastic somewhere much closer to home - inside us. As plastic breaks down, it forms microscopic particles known as microplastics and even smaller nanoplastics. Humans can encounter these particles through food, drinking water and the air we breathe. Researchers have no

Biodegradable plastics (a type of bioplastic) have been developed to attempt to mitigate the plastic waste management problem. Plastic once produced, doesn’t just disappear. It’s either sent to landfill, incinerated, recycled (only 9% of plastic has ever been recycled), or ends up polluting the environment. Biodegradable plastics can be broken down by microorganisms into safe by-products such as water, natural gas and biomass. A big concern with biodegradable plastics is whet

From a plastic bottle to microplastic particles, told as if it happened in a single day 6:00 AM It began the workday at 6 AM: filled, capped, handed to someone in a hurry. It held water for twenty minutes, then was put down and, missing the recycling bin by a few steps, dropped into a drain instead. It is made of PET, which is a recyclable plastic engineered to resist breaking down. It is built for permanence, but used within minutes. 9:00 AM Rain carried it to a stream, the

It is generally well known that microplastic particles are found all over our environment, including in the food we eat. Alarmingly, one of the biggest reasons behind that is the textile industry, the third-largest consumer of plastic, standing just behind packaging and construction. Clothing items from familiar fast-fashion brands have been found to contain plastic fibres which not only end up in landfills and oceans, but consequently in our food, seriously impacting our phy

Netflix’s documentary, The Plastic Detox, explores potential health impacts of microplastic exposure in everyday life, focusing on endocrine-disrupting chemicals and fertility. Unlike other plastic documentaries, this one gives an intimate insight into plastic’s effect on human health in their home and town, rather than on plastic pollution in the oceans. It highlights the scarily vast and extensive amount of plastic that is in our daily lives. From the minute you wake up an

In 2026, The Big Plastic Count estimated that the UK bins 82 billion pieces of plastic each year, with over half, 59%, being burnt in the UK. So how much are we consuming? The World Wide Fund for Nature (WWF) published a report in 2019 based on research that estimated humans ingest around 5g of plastic weekly, a credit card’s worth, equating to around 50 plastic bags annually. A shocking number, shared by news outlets globally, but how true is it? Microplastics are particles

There is considerable scientific consensus that plastic is found in the human body. However, researchers have called some of these studies into question. When the media report on this kind of scientific disagreement, they often use dramatic headlines that imply that an entire field of research has been undermined. But is this really the way that science works? Microplastics are found in the air we breathe and the food and drink we consume; therefore, it is no surprise that so

Plastic is often seen as a miracle material. It certainly has useful properties: it’s durable, versatile and cheap. But what exactly is plastic? Plastics are moldable materials made up of polymers – long chains made from repeating molecules. Almost all plastics are derived from fossil fuels such as crude oil and natural gas. These contain a mixture of hydrocarbons which are processed in various stages to make plastic: Refining - Fossil fuels are extracted and refined into pro

Perhaps you’re thinking oh - plastics aren’t my problem. Turtles getting trapped is sad, but I’m safe. You’d be wrong. The idea that plastic pollution only affects wildlife is a dangerous misconception. In reality, humans are part of the marine food web, and we’re already consuming the consequences of plastic waste. Microplastics - particles smaller than 5mm - are now found in 99% of seafood. Shrimp, mussels, fish and even sea salt have tested positive for plastic contamina

The global trade in plastic waste reveals stark inequalities. For decades, high-income countries like the UK, US, Germany and Japan exported much of their plastic waste to lower-income nationals, often with weak waste infrastructures (OECD 2022, Plastics Treaty Briefing 2023). This practice, often referred to as “waste colonialism,” offloads the environmental burden of consumption onto those least able to manage it. As recently as 2018, Asia imported 70-80% of the world’s tr

The idea that plastic will outweigh fish in the ocean by 2050 has become one of the most widely-quoted statistics in environmental discussions. But this disguises the real nature of the problem. Fish make up around 29% of animal biomass on this planet (Ritchie 2024) but calculating their mass in oceans is very difficult. We can estimate algae concentrations from satellite imagery - a proxy for fish food - but actual marine biomass remains uncertain and rather variable. Est

In the United Kingdom, we purchase an estimated 7.7 billion bottles of water every year. This is partially due to the misconception that bottled water is cleaner and healthier than tap water. New technological developments have allowed scientists to detect and count miniscule plastic particles called nanoplastics in bottled water. These particles are absorbed when we drink water from plastic bottles and may impact our health. What are Nanoplastics? Nanoplastics are tiny plas