Hidden in Plain Sight: What a New Study Reveals About Microplastics in Bangladesh's Toothpaste
A Product Used Twice a Day, Under New Scrutiny
Toothpaste is one of those household items nobody thinks twice about. It sits on the bathroom shelf, gets squeezed onto a brush morning and night, and is used by nearly every person in the country without a second glance at the ingredient list. That casual trust is exactly what makes a new study from the Environment and Social Development Organisation (ESDO) so unsettling. After a year of laboratory testing, consumer surveys, and interviews with regulators, ESDO has confirmed that a significant majority of toothpaste brands sold in Bangladesh contain measurable amounts of microplastic particles — invisible to the naked eye, absent from any label, and present in products marketed even to small children.
The study, titled "Microplastics in Toothpaste: Scientific Evidence for Policy and Regulatory Action in Bangladesh," was unveiled at a press briefing at ESDO's office in Dhaka's Lalmatia neighborhood. It represents, according to the organisation, the country's first scientific baseline on this specific issue, and it was explicitly designed to feed into future national standards and regulatory action rather than simply generate a headline.
Inside the Research: Methodology and Scope
What separates this study from a quick spot-check is its scale and structure. Researchers spent a full year, from July 2025 to June 2026, combining three strands of investigation: a nationwide consumer survey covering 2,760 respondents to gauge toothpaste usage habits and public awareness of microplastics; laboratory analysis of purchased products; and interviews with regulators and scientific experts to understand the policy landscape.
For the laboratory component, the team collected 34 toothpaste samples representing 19 different brands. These products were sourced from a mix of retail outlets, supermarkets, and wholesale markets to reflect how ordinary consumers actually shop, rather than relying on a single retail channel that might skew the sample. The brands originated from four countries: the majority were manufactured domestically in Bangladesh, while the rest were imported from India, Thailand, and Vietnam. All laboratory testing was carried out at the Laboratory of Environmental Health and Ecotoxicology, housed within the Department of Environmental Sciences at Jahangirnagar University — giving the findings an academic, peer-reviewable foundation rather than relying solely on advocacy-group assertions.
The Headline Number: Three Out of Four
The central finding is stark. Of the 34 samples tested, 26 contained detectable microplastic particles — a rate of 76.5 percent. Put another way, roughly three out of every four toothpaste tubes on Bangladeshi shelves carry some quantity of plastic fragments small enough to slip past casual inspection and, potentially, past the body's natural defenses. Only eight of the 34 samples showed no detectable microplastic content at all.
The concentration of particles varied considerably from product to product, ranging between 20 and 320 particles per 100 grammes of toothpaste. That range matters because it shows this isn't a uniform contamination affecting every brand equally; some products were relatively cleaner while others carried a far heavier plastic load. According to ESDO's research and policy associate, Foijun Nahar, who presented the findings, the expectation going in should have been zero — toothpaste, she noted, is not a product that should contain any microplastic content whatsoever, given that it is used directly in the mouth and swallowed in trace amounts by nearly everyone at some point.
Where the Contamination Concentrates
Breaking the numbers down by country of origin reveals a striking pattern. Among the 25 samples manufactured domestically in Bangladesh, 22 tested positive for microplastics — meaning locally produced toothpaste was contaminated at an even higher rate than the overall average. By contrast, imported products showed a mixed picture: only one of five Indian samples and one of two Thai samples contained microplastics, while both of the two samples imported from Vietnam tested positive. The small sample sizes for imported brands make firm conclusions about country-of-origin trends difficult, but the domestic figures alone are large enough to be statistically meaningful and point to gaps in local manufacturing practices or raw material sourcing.
The single worst offender identified in the study was a product called Mediplus Fluoride Gel, which registered 320 particles per 100 grammes — the highest concentration found in any sample tested. This detail carries extra weight because, according to the consumer survey data gathered alongside the lab work, Mediplus Fluoride Gel was also the most commonly used toothpaste brand among respondents, cited by 35.6 percent of those surveyed. In other words, the product found to be most heavily contaminated is also the one most Bangladeshi households are likely to have in their bathroom right now.
Individual manufacturers fared unevenly as well. Nine of the 34 samples came from Unilever Bangladesh, and microplastics were detected in eight of those nine — an 89 percent positive rate within that single company's product line. When contacted by journalists, Unilever responded in writing that all of its products, toothpaste included, are developed and manufactured according to rigorous global quality standards and applicable local regulations, and it stated the company was still reviewing ESDO's methodology and findings. Square Toiletries, another major domestic manufacturer, fared no better on this particular metric: all six of its samples tested in the study showed detectable microplastic content, a 100 percent positive rate within that sample set. These figures do not necessarily reflect these companies' entire product catalogues, since only a handful of SKUs from each were tested, but they do indicate that market leaders are not immune to the contamination pattern found across the industry.
Children's Toothpaste: A Particularly Sensitive Finding
Perhaps the most concerning subset of the data involves products marketed specifically for children. Six of the 34 samples tested were children's toothpaste formulations, and four of those six were found to contain detectable microplastics, with concentrations ranging from 20 to 140 particles per 100 grammes. Only two children's products came back clean.
This finding matters for a few reasons beyond the raw numbers. Young children are known to swallow a larger proportion of toothpaste during brushing compared to adults, who have generally learned to spit thoroughly. Children's bodies are also still developing, and toxicological research broadly suggests that developing organ systems can be more vulnerable to environmental contaminants than mature ones. A product explicitly formulated and marketed as safe for a toddler or young child carrying the same category of contamination found in adult formulations is likely to draw particular attention from parents, pediatricians, and regulators alike.
What Microplastics Might Mean for Health
Microplastics are generally defined as plastic fragments smaller than five millimetres, and they can originate from a wide range of sources — the breakdown of larger plastic waste, synthetic textile fibers shed during washing, and manufactured microbeads that were once common in personal care products before many countries began restricting them. In toothpaste specifically, microplastics have historically been used for functions like providing mild abrasive texture, controlling viscosity, or serving as a carrier for other ingredients.
The scientific understanding of what microplastics do once inside the human body is still evolving, but the research summarized in and around this study points to several systems of potential concern: the respiratory system, the digestive tract, the immune system, the cardiovascular system, and the nervous system have all been flagged in emerging research as plausible targets for microplastic-related effects. It's worth being precise about the state of the evidence here — this remains an active and developing area of toxicology, and the ESDO study itself is presented as a baseline meant to prompt further investigation and regulatory caution rather than a definitive statement that any specific health outcome has been proven in humans from toothpaste exposure specifically. The precautionary framing echoes how many public health bodies have approached microplastics more broadly: the potential risk profile is serious enough to warrant reducing exposure now, even while long-term epidemiological data continues to accumulate.
A Global Pattern, With Local Variation
Bangladesh is far from alone in confronting this issue, and comparing the ESDO results to prior international research helps put the numbers in context. A 2019 study in Turkey using Fourier-transform infrared spectroscopy found polyethylene microplastics in only 4 of 20 toothpaste samples tested, a considerably lower positive rate than what ESDO found domestically. A 2022 study conducted in India, using a related infrared technique combined with microscopic analysis, went further in the opposite direction, detecting microplastics — including cellophane, polypropylene, polyvinyl chloride, and polyamide particles — in all 10 of the samples it examined, and estimated that toothpaste use nationally releases well over a billion grammes of microplastic particles into the environment each year. Meanwhile, a large-scale Chinese study examining 135 toothpaste samples using both infrared and Raman spectroscopy techniques reported no detectable microplastics at all, suggesting that manufacturing standards, regulatory enforcement, and raw material choices can produce dramatically different outcomes even for the same product category. Bangladesh's 76.5 percent contamination rate sits toward the higher end of this international spread, closer to the Indian findings than to the near-zero results reported out of China.
Labeling Gaps and Consumer Awareness
One of the more quietly damning aspects of the ESDO report is what it says about transparency. None of the tested products disclosed the presence of microplastics or synthetic polymer ingredients anywhere on their packaging or labeling, meaning consumers had no way to identify, avoid, or even become aware of this content through ordinary label-reading. The accompanying consumer survey reinforced this gap, finding that public awareness of microplastics in oral care products remains limited across the surveyed population. In practice, this means millions of people have been making purchasing decisions about a product they use daily without any of the information needed to factor microplastic content into that choice.
Where Regulation Goes From Here
ESDO's recommendations, delivered alongside the data, center on phasing out and eventually banning the intentional use of microplastics in toothpaste formulations, paired with encouragement for manufacturers to adopt safer and more sustainable alternative ingredients. Officials from the Bangladesh Standards and Testing Institution (BSTI), responding to the findings, indicated that the agency is considering amending the relevant statutory regulatory order to introduce specific criteria or a maximum permissible limit for microplastic content in toothpaste — a meaningful signal that the study's evidence base may translate into concrete regulatory change rather than remaining an isolated advocacy report.
This kind of regulatory response would put Bangladesh in the company of a number of other countries that have already moved to restrict certain categories of microplastics, particularly the plastic microbeads once widely used in personal care and cosmetic products, in response to similar environmental and health concerns.
The Bottom Line
For the roughly two-thirds of Bangladeshi households represented in ESDO's consumer survey, this study lands as an uncomfortable but useful piece of information. It doesn't suggest that toothbrushing itself is dangerous, nor does it claim to have proven specific disease outcomes in humans from toothpaste-derived microplastics. What it does establish, with a methodologically sound year-long research process behind it, is that a majority of the toothpaste brands sold in the country — including some marketed to children — contain a category of contaminant that arguably has no place in an oral care product at all, that none of the affected products disclose this on their labels, and that public awareness of the issue remains low. Whether that translates into tighter manufacturing standards, reformulated products, or simply more informed consumer choices will depend on how regulators, manufacturers, and the public respond to a baseline that, until this study, simply didn't exist.
FAQ: Microplastics in Toothpaste (Bangladesh Study)
1. How many toothpaste brands were found to contain microplastics? 26 of 34 samples tested (76.5%), spanning 19 brands sold in Bangladesh.
2. Which brand had the highest microplastic level? Mediplus Fluoride Gel, at 320 particles per 100g — also the most widely used brand among survey respondents.
3. Is children's toothpaste affected too? Yes. 4 of 6 children's toothpaste samples tested positive, with 20–140 particles per 100g.
4. Do toothpaste labels disclose microplastic content? No — none of the tested products listed microplastics or synthetic polymers as ingredients on their packaging.
5. Is regulation likely to change because of this study? Possibly. BSTI officials said they're considering amending regulations to set a maximum permissible microplastic limit for toothpaste.
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