Latest news with #forever chemicals
SBS Australia
3 days ago
- Health
- SBS Australia
Sugar alternatives are on the rise. They might not be so sweet for the environment
Artificial sweeteners are popular in Australia, with more than one tonne of them consumed daily across the country and food manufacturers increasingly pivoting to sugar-free soft drinks and confectionery. But a new study suggests that the environment might be paying the price for the rise of popular sugar substitutes, with the alternatives building up in waterways around the world. The research, published in the Journal of Hazardous Materials, was led by University of Technology Sydney's Dr Xuan Li. Researchers examined the type and prevalence of artificial sweeteners in wastewater treatment plants across 24 countries, as well as changes in concentration and how effectively they were removed. It found widely used sugar substitutes are not decomposing, and are turning into 'forever chemicals' that are comparable to polyfluoroalkyl substances (PFAS) in their potential harm to animals and the environment. LISTEN TO SBS News 14/07/2025 04:29 English PFAS are a group of man-made chemicals commonly used in water-resistant and non-stick items. They have been identified in a growing body of research as a toxin and carcinogen with proven negative impacts on the environment and human health. Why do sweeteners cause a problem? Unlike natural sugars, artificial sweeteners are designed to resist digestion and not be fully absorbed by the human body. For the same reason, they don't break down as easily in waterways or on the land, and can enter wastewater systems that aren't equipped to deal with them through standard treatment processes. "Whatever we are eating will eventually discharge into wastewater and become concentrated in wastewater treatment plants," Li said. "Our treatment plants are not easily able to degrade them as well. So they will be directly discharged into the environment. And this will gradually lead to the accumulation in the environment and eventually effect all the water creatures." Artificial sweeteners are not fully absorbed by the human body. Source: Getty / Juanmonino/iStockphoto Li said that some fish may die early as a result, and that represented a potentially big problem in the ecosystem. "The bottom line is anything changing the fish will eventually impact the upper food chain and impact other creatures. We have found algae can be impacted, and they all of a sudden bloom, and all of a sudden die, because of the build-up of artificial sweeteners." Were all sweeteners equally harmful? No. One product scored worst when it came to its ability to decompose (or lack thereof) — sucralose, which is marketed as Splenda in supermarkets around the world. Acesulfame, also known as Ace K, was also harder to remove and was released into the wider environment. Two other sweeteners, saccharin and cyclamate, were comparatively easy to remove from water, the study found. These four substitutes were found to be the most prevalent artificial sweeteners. Other artificial sweeteners found in wastewater included neotame, stevia and neo hesperidin dihydrochalcone (NHDC). What could the potential impact be? Li says its impossible to know how long it will take for the build-up of these microtoxins to have a detrimental impact on humans — and to know how severe that impact could be. She said that while there has been much focus on PFAS in recent years, artificial sweeteners have a similar "accumulation pathway" in our environment and in drinking water, affecting organisms. Li said more research needs to happen to determine the impact of sweeteners on our planet, ecosystem and personal health. The study calls for ongoing monitoring, tighter regulations and improved treatment technologies to reduce the potential environmental risks artificial sweeteners pose. In the meantime, Li said we each have a choice. "As consumers ourselves, we can think twice when we are trying to purchase a product," Li said. "I know artificial sweeteners can sound very tempting if you're trying to control your blood sugar level, your body weight. But the question is, do we really understand them well enough? If not, maybe the conventional sugary stuff will be a better solution."
The Guardian
3 days ago
- Health
- The Guardian
Some gut microbes can absorb and help expel ‘forever chemicals' from the body, research shows
Certain kinds of gut microbes absorb toxic Pfas 'forever chemicals' and help expel them from the body via feces, new first-of-its-kind University of Cambridge research shows. The findings are welcome news as the only options that exist for reducing the level of dangerous Pfas compounds from the body are bloodletting and a cholesterol drug that induces unpleasant side effects. The microbes were found to remove up to 75% of some Pfas from the gut of mice. Several of the study's authors plan to develop probiotic dietary supplements that boost levels of helpful microbes in the human gut, which would likely reduce Pfas levels. 'If this could be used in humans to create probiotics that can help remove Pfas from the body then this would be a nicer solution in that it wouldn't have so many side effects,' said Anna Lindell, Cambridge doctoral student and a co-author of the study. Pfas are a class of about 15,000 compounds most frequently used to make products water-, stain- and grease-resistant. They have been linked to cancer, birth defects, decreased immunity, high cholesterol, kidney disease and a range of other serious health problems. They are dubbed 'forever chemicals' because they do not naturally break down in the environment. The US Environmental Protection Agency has found no level of exposure to Pfos or Pfoa, two of the most common Pfas compounds, in drinking water is safe. They have a half-life in human blood of anywhere from two to five years, by most estimates. That means the body expels half the amount of the chemical that is in blood during that period. Depending on blood levels, it can take decades to fully expel Pfas naturally. Though the findings represent the first time gut microbes have been found to remove Pfas, they have been found to alleviate the impacts of other contaminants, such as microplastics. The researchers didn't set out to determine if the gut bacteria expelled Pfas specifically, but instead looked at a suite of 42 common food contaminants. No Pfas limits for food exist in the US, but there is broad consensus that it is among the main exposure routes. Some microbes performed well in expelling Pfas, so the study's authors zoomed in on those. The authors introduced nine of a family of bacterial species into the guts of mice to humanize the mouse microbiome – the bacteria rapidly accumulated to absorb Pfas eaten by the mice, and the chemicals were then excreted in feces. The bacteria seem to absorb the chemical, then use a 'pump' mechanism that pushes toxins from the cells and aids in excretion, the authors wrote. The mechanism by which the chemicals are pulled into the cell is not yet understood, Lindell said, but she suspects there may be a similar pump. These are developed by microbes to expel other contaminants, drugs or antibiotics, Lindell added. Sign up to Detox Your Kitchen A seven-week expert course to help you avoid chemicals in your food and groceries. after newsletter promotion The microbes largely addressed 'long-chain' Pfas, which are larger compounds and more dangerous than smaller 'short chains' because they stay in the body longer. The body more efficiently discharges short-chain Pfas through urine because the compounds are generally water-soluble. Among the most common and dangerous long chains are Pfoa and Pfna, which the microbes expelled at rates of up to 58% and 74%, respectively. Lindell and other study leaders have started a company, Cambiotics, that will develop a probiotic based on their findings. They are planning to follow up the research with a human study. However, Lindell stressed that the probiotic would not solve the broader Pfas crisis: 'This should not be used as an excuse to downplay other sustainable solutions or to not address the bigger Pfas problem.'
Yahoo
3 days ago
- Health
- Yahoo
Some gut microbes can absorb and help expel ‘forever chemicals' from the body, research shows
Certain kinds of gut microbes absorb toxic Pfas 'forever chemicals' and help expel them from the body via feces, new first-of-its-kind University of Cambridge research shows. The findings are welcome news as the only options that exist for reducing the level of dangerous Pfas compounds from the body are bloodletting and a cholesterol drug that induces unpleasant side effects. The microbes were found to remove up to 75% of some Pfas from the gut of mice. Several of the study's authors plan to develop probiotic dietary supplements that boost levels of helpful microbes in the human gut, which would likely reduce Pfas levels. Related: Trump administration yanks $15m in research into Pfas on US farms: 'not just stupid, it's evil' 'If this could be used in humans to create probiotics that can help remove Pfas from the body then this would be a nicer solution in that it wouldn't have so many side effects,' said Anna Lindell, Cambridge doctoral student and a co-author of the study. Pfas are a class of about 15,000 compounds most frequently used to make products water-, stain- and grease-resistant. They have been linked to cancer, birth defects, decreased immunity, high cholesterol, kidney disease and a range of other serious health problems. They are dubbed 'forever chemicals' because they do not naturally break down in the environment. The US Environmental Protection Agency has found no level of exposure to Pfos or Pfoa, two of the most common Pfas compounds, in drinking water is safe. They have a half-life in human blood of anywhere from two to five years, by most estimates. That means the body expels half the amount of the chemical that is in blood during that period. Depending on blood levels, it can take decades to fully expel Pfas naturally. Though the findings represent the first time gut microbes have been found to remove Pfas, they have been found to alleviate the impacts of other contaminants, such as microplastics. The researchers didn't set out to determine if the gut bacteria expelled Pfas specifically, but instead looked at a suite of 42 common food contaminants. No Pfas limits for food exist in the US, but there is broad consensus that it is among the main exposure routes. Some microbes performed well in expelling Pfas, so the study's authors zoomed in on those. The authors introduced nine of a family of bacterial species into the guts of mice to humanize the mouse microbiome – the bacteria rapidly accumulated to absorb Pfas eaten by the mice, and the chemicals were then excreted in feces. The bacteria seem to absorb the chemical, then use a 'pump' mechanism that pushes toxins from the cells and aids in excretion, the authors wrote. The mechanism by which the chemicals are pulled into the cell is not yet understood, Lindell said, but she suspects there may be a similar pump. These are developed by microbes to expel other contaminants, drugs or antibiotics, Lindell added. The microbes largely addressed 'long-chain' Pfas, which are larger compounds and more dangerous than smaller 'short chains' because they stay in the body longer. The body more efficiently discharges short-chain Pfas through urine because the compounds are generally water-soluble. Among the most common and dangerous long chains are Pfoa and Pfna, which the microbes expelled at rates of up to 58% and 74%, respectively. Lindell and other study leaders have started a company, Cambiotics, that will develop a probiotic based on their findings. They are planning to follow up the research with a human study. However, Lindell stressed that the probiotic would not solve the broader Pfas crisis: 'This should not be used as an excuse to downplay other sustainable solutions or to not address the bigger Pfas problem.'
The Guardian
4 days ago
- Health
- The Guardian
Some gut microbes can absorb and help expel ‘forever chemicals' from the body, research shows
Certain kinds of gut microbes absorb toxic Pfas 'forever chemicals' and help expel them from the body via feces, new first-of-its-kind University of Cambridge research shows. The findings are welcome news as the only options that exist for reducing the level of dangerous Pfas compounds from the body are bloodletting and a cholesterol drug that induces unpleasant side effects. The microbes were found to remove up to 75% of some Pfas from the gut of mice. Several of the study's authors plan to develop probiotic dietary supplements that boost levels of helpful microbes in the human gut, which would likely reduce Pfas levels. 'If this could be used in humans to create probiotics that can help remove Pfas from the body then this would be a nicer solution in that it wouldn't have so many side effects,' said Anna Lindell, Cambridge doctoral student and a co-author of the study. Pfas are a class of about 15,000 compounds most frequently used to make products water-, stain- and grease-resistant. They have been linked to cancer, birth defects, decreased immunity, high cholesterol, kidney disease and a range of other serious health problems. They are dubbed 'forever chemicals' because they do not naturally break down in the environment. The US Environmental Protection Agency has found no level of exposure to Pfos or Pfoa, two of the most common Pfas compounds, in drinking water is safe. They have a half-life in human blood of anywhere from two to five years, by most estimates. That means the body expels half the amount of the chemical that is in blood during that period. Depending on blood levels, it can take decades to fully expel Pfas naturally. Though the findings represent the first time gut microbes have been found to remove Pfas, they have been found to alleviate the impacts of other contaminants, such as microplastics. The researchers didn't set out to determine if the gut bacteria expelled Pfas specifically, but instead looked at a suite of 42 common food contaminants. No Pfas limits for food exist in the US, but there is broad consensus that it is among the main exposure routes. Some microbes performed well in expelling Pfas, so the study's authors zoomed in on those. The authors introduced nine of a family of bacterial species into the guts of mice to humanize the mouse microbiome – the bacteria rapidly accumulated to absorb Pfas eaten by the mice, and the chemicals were then excreted in feces. The bacteria seem to absorb the chemical, then use a 'pump' mechanism that pushes toxins from the cells and aids in excretion, the authors wrote. The mechanism by which the chemicals are pulled into the cell is not yet understood, Lindell said, but she suspects there may be a similar pump. These are developed by microbes to expel other contaminants, drugs or antibiotics, Lindell added. Sign up to Detox Your Kitchen A seven-week expert course to help you avoid chemicals in your food and groceries. after newsletter promotion The microbes largely addressed 'long-chain' Pfas, which are larger compounds and more dangerous than smaller 'short chains' because they stay in the body longer. The body more efficiently discharges short-chain Pfas through urine because the compounds are generally water-soluble. Among the most common and dangerous long chains are Pfoa and Pfna, which the microbes expelled at rates of up to 58% and 74%, respectively. Lindell and other study leaders have started a company, Cambiotics, that will develop a probiotic based on their findings. They are planning to follow up the research with a human study. However, Lindell stressed that the probiotic would not solve the broader Pfas crisis: 'This should not be used as an excuse to downplay other sustainable solutions or to not address the bigger Pfas problem.'
