1. What the supermarket produce report establishes

Pesticide Action Australia’s 2026 report describes 78 samples of 13 produce types bought from three supermarket chains in five cities in June. It reports 201 residue detections involving 54 pesticides; 56% of samples had a pesticide without EU approval and 44% had an OECD-defined PFAS pesticide. These overlapping categories are not national prevalence estimates. [1]

The report describes same-day laboratory delivery, documented custody and NATA-accredited analysis. Raw data are available on request. GardenBuddy has not obtained that package or independently confirmed the compliance findings. Report: methodology and prohibited residues

A supermarket purchase is a useful real-world sample. It is still only a sample. To estimate the wider food supply, we would need a sampling design covering seasons, regions, retailers and production systems, with transparent selection and suitable weighting. To estimate health risk, we would also need concentrations and consumption data, not simply the number of detected substances.

How a residue becomes a consumer exposure estimate

The starting calculation is concentration multiplied by the amount eaten. If concentration is expressed in milligrams per kilogram of food and consumption in kilograms of food, the result is milligrams ingested. A body-weight-adjusted estimate then divides that amount by the consumer’s body weight. This is an intake estimate; the fraction absorbed and what the body does with it are further questions.

For a complete diet, an assessor considers contributions from relevant foods. For an acute assessment, a large serving on a particular occasion may matter. A chronic assessment needs a defensible picture of exposure over time. Neither calculation can be reconstructed reliably from a headline saying that a sample contained several residues.

The concentration units matter, too. One milligram per kilogram is numerically the same as one part per million by mass. A detection frequency is a proportion of tested samples, while a concentration measures how much was present in a sample. These quantities answer different questions and should not share an axis labelled simply “contamination”.

The reported findings justify follow-up. They do not establish how much of each chemical a typical Australian absorbs, which farm practices produced a particular result, or how many illnesses could be attributed to those residues. Those are additional research questions.

2. What makes a laboratory result convincing?

A reliable result has several layers: a clearly defined sample, an analytical method that can identify the substance, controls against contamination, and a conclusion that stays within the design. Accreditation is valuable, but it does not replace access to the method, its scope and the measurements.

This checklist explains why some claims can be assessed more confidently than others. For the Australian produce report, the public summary does not give us the full analytical package needed to independently audit every detection and compliance interpretation. That is an evidence-access limit, not proof that the results are wrong.

For microplastics, the identification problem is especially important. Heating tissue can generate fragments from natural fats that resemble products generated by certain plastics. A convincing study needs to separate those possibilities. Queensland researchers have explicitly investigated that problem, rather than assuming every polymer-like signal is plastic. See the method-validation study

In the references, PDF links include page numbers and web links use verified section anchors where available. Text-highlight links point to a relevant passage where the browser supports them. The accompanying location label remains useful if a publisher or browser does not jump automatically.

3. What do crop-protection chemicals add to production costs?

ABARES Table 18 provides a measurable historical comparison: chemical expenditure averaged $17–$97 per tonne across six vegetables in 2015–16 to 2017–18, expressed in 2018–19 dollars. Dividing by 1,000 gives dollars per kilogram; multiplying by 100 gives cents per kilogram. Source: Table 18

These figures are a production-cost component, not a supermarket-price surcharge. “Chemicals” is the survey’s expenditure category, not a count of sprays or a complete cost of crop protection. Application labour, machinery and contractors may sit elsewhere. The averages include different production systems, including processing crops, and are not current quotes.

There is also an important economic distinction between paying for treatment and the price of producing a saleable crop without it. Removing a chemical could require extra labour, exclusion netting, different varieties or another treatment. It might also change yield, grading losses and the timing of harvest. Those changes affect cost per saleable kilogram. Simply subtracting chemical purchases from a budget cannot estimate the resulting price.

The retail calculation has further stages: packing, transport, wastage, wholesale and retail operating costs, margins and changing supply. A farm budget does not identify how those stages would respond. We therefore cannot responsibly say that removing pesticides would make every kilogram cheaper by the amount in the graph, or that it would increase prices by a universal percentage.

What we can say is more useful: chemical purchases were a measurable but limited component of the listed production costs in this historical comparison. A serious transition plan should cost the whole alternative system and measure yield and quality alongside chemical use. Farmers should be supported to make that transition, rather than expected to absorb every financial risk.

What a credible comparison of growing systems would measure

To compare a conventional treatment programme with an alternative, start with the same crop and a clearly defined production setting. Record all relevant inputs, including labour and equipment, rather than only the price on a chemical container. Record saleable harvest weight and quality losses as well as total plant growth.

Then report costs per saleable kilogram, the uncertainty and the seasons observed. A method that works in one low-pest season may perform differently in a wet or high-pressure season. A useful comparison also documents the actual treatments and residues, rather than using a farming label as a substitute for measurements.

This is a proposed evaluation approach, not a claim that these trials have already established one universal winner. It would help growers, buyers and households discuss trade-offs using the same evidence. Retail-price effects would still need a separate supply-chain analysis.

For households buying locally, ask about the crop and the growing method rather than assuming distance determines safety. A nearby grower may be able to explain pest monitoring and treatment decisions directly. Buying seasonal produce, placing regular orders and accepting harmless cosmetic variation are practical ways to build that relationship.

4. Pesticide markers are measurable in people

Biomonitoring measures a chemical or one of its breakdown products in blood, urine or another biological sample. It can demonstrate exposure that a shopping-basket test cannot. However, a urine marker is not automatically a measure of material stored in organs. The CDC also cautions that detecting an environmental chemical does not, by itself, establish a health effect. [6]

An Australian dietary experiment

In a Melbourne randomised crossover study, 13 adults consumed at least 80% organic or conventional food for seven days and then switched diets. Researchers measured six urinary dialkylphosphate metabolites using GC–MS/MS. Mean total DAP levels were 89% lower during the organic phase; the total diethyl subgroup did not differ significantly. Oates et al.: Abstract, Methods and Results

This small experiment supports a dietary contribution to exposure. DAPs are not unique to one pesticide and may also reflect ingested breakdown products. The study did not test cancer incidence or long-term neurological outcomes. A lower biomarker is evidence of changed exposure, not a quantified promise of better health.

A US intervention with pesticide-specific measurements

A separate study followed 16 people in four US families and analysed 158 urine samples across conventional and organic diet phases. Selected modelled reductions appear below. Methods included mass spectrometry, reference standards and quality-control samples; these were repeated samples from 16 people, not 158 independent participants. [5]

The confidence intervals describe uncertainty in the modelled reductions. They are not a safe intake range. This was a small before-and-after study, not a long-term clinical trial. The numbers cannot be applied as the expected benefit of a particular home garden, shopping change or Australian product.

Together, the interventions support a practical point: food choices can change some measured pesticide-exposure markers. They do not mean organic food contains no pesticides, nor that everyone must afford a completely organic diet to eat well. Growing a few ingredients can be another way to control what you deliberately apply to those plants, provided you also manage soil, water and handling responsibly.

Detection, accumulation and repeated exposure are different

ATSDR explains that pyrethrins and pyrethroids generally break down and leave the body quickly, mainly through urine, although high or prolonged exposure can lead to some retention. That is a different pattern from a substance with a multi-year human half-life. [8]

Among well-studied PFAS, ATSDR reports half-lives ranging from days to eight years or more. A half-life is the time for the amount to fall by half after exposure stops. Those figures must not be assigned to every fluorinated pesticide: environmental persistence, human retention and toxicity are different properties. [9]

A rapidly cleared chemical can still cause harm during exposure. Conversely, persistence alone does not tell us the dose that causes an effect. A scientifically useful assessment needs both the substance’s behaviour and its biological effects. There is no single answer for “pesticides” or “PFAS” as a whole.

5. What does the long-term health evidence show?

Long-term evidence comes from different designs. Toxicology studies examine mechanisms and effects at defined doses. Cohort studies observe people over time. Dietary interventions can test whether an exposure changes. Each contributes something different, and no single design answers every question about ordinary food consumption.

Developing brains: an important organophosphate finding

The CHAMACOS cohort examined children from an agricultural community. In the analysed cohort of 329 children, higher maternal urinary DAP markers during pregnancy were associated with poorer cognitive performance at age seven. Children in the highest maternal-exposure quintile averaged seven fewer IQ points than those in the lowest; the paper discusses adjustment for maternal education, intelligence and home environment. Journal p. 1192: Discussion; p. 1193: Figure 1

This is an association in a particular population, not evidence that a particular supermarket food lowers a child’s IQ by seven points. Exposure could include occupational and environmental routes as well as diet; DAP markers are non-specific, and observational adjustment cannot remove every source of confounding. It is nonetheless substantial evidence for taking developmental exposure seriously.

PFAS: health findings belong to named substances

ATSDR summarises associations between particular studied PFAS and cholesterol, vaccine-antibody response, liver enzymes and some pregnancy outcomes. PFOA exposure has also been associated with kidney and testicular cancer. These are substance-specific findings. They do not establish the same effects for every OECD-defined PFAS pesticide or quantify the risk from the produce survey. Named PFAS and associated outcomes

This distinction matters when communicating concern. Saying “some PFAS have important health evidence” is defensible. Saying “every fluorinated pesticide causes the same diseases at the residues measured here” requires evidence that has not been supplied. Grouping substances can support precaution and research priorities, but it cannot substitute for the exposure assessment needed to estimate a consumer’s risk.

Mixtures are a real assessment problem

Several chemicals can affect the same biological system. EFSA’s cumulative assessment programme groups pesticides by shared toxicological effects. Initial work on thyroid and nervous-system effects found risks below the regulatory action threshold in the evaluated European scenarios, with uncertainties. That finding does not cover every mixture, endpoint or Australian consumer. FAQ: Questions 1–3

Counting residues is therefore insufficient in both directions. Several tiny detections do not automatically establish a harmful mixture, but checking each substance separately may not fully answer a shared-effect question. We need concentrations, potency, consumption, timing and a scientifically supported way to combine the exposures.

There is also no requirement that a chemical remain in the body for decades to have a lasting consequence. An effect during pregnancy or another sensitive period may persist after the substance has cleared. This is why the question “does it accumulate?” is important but cannot replace the broader question “what can this exposure do, and when?”

What Australian monitoring contributes

FSANZ’s 25th Total Diet Study, published in 2019 from food collected in 2013–2014, found generally low agricultural and veterinary chemical concentrations. Estimated exposures were below acceptable daily intakes for all but one assessed chemical; prothiofos prompted follow-up and changes to use. Later studies investigated different substances. These results are historical context, not a current certificate for every food. 25th study: agricultural and veterinary chemicals

An MRL is a compliance benchmark associated with approved use. Health assessment compares dietary exposure with values for short- and long-term exposure. A result 9.5 times an MRL is not automatically 9.5 times a health-risk threshold, but it is a reason to investigate the relevant use and exposure. What an MRL is

Better monitoring would connect these layers: publish concentrations and methods, investigate unusual results, assess exposure in relevant age groups, and explain what action followed. Public confidence depends on that chain being visible.

6. Why can the EU and Australia reach different decisions?

The EU assesses exposure and also has exclusion criteria for specified serious hazards, with limited exceptions. Australian decisions apply Australian statutory safety criteria to proposed uses. A pesticide’s approval status, permission for a specific crop and the residue rules for imported food are different questions. Approval criteria, exclusions and exceptions

For chlorpyrifos and dimethoate, the European decisions involve substantive human-health concerns. They deserve direct engagement, not a vague assurance that different countries simply have different preferences. For the three neonicotinoids, the history also demonstrates why environmental grounds and commercial withdrawal must be distinguished from consumer toxicity.

These examples do not independently establish that every detection in the Australian report was an authorised use. To decide that, a regulator would need the product, crop, application date, label, any permit, residue definition and applicable food standard. A chemical remaining registered for one purpose does not make every use legal.

Differences can reflect legislation, new evidence, permitted application patterns, the timing of review and how uncertainty is handled. The useful public question is specific: what evidence supports each remaining use, how has the overseas finding been addressed, and what would trigger reassessment? A transparent answer is more informative than assuming either jurisdiction is always right.

7. Microplastics: where they come from and how exposure happens

Microplastics are generally described as plastic particles smaller than 5 mm. “Nanoplastics” refers to still smaller particles, but size boundaries vary between publications. A paper examining particles above 700 nm is not measuring the same range as a method restricted to much larger fragments. That difference affects both detection and comparisons.

Some particles are manufactured small; others form as larger products weather, abrade and fragment. UNEP identifies sources including synthetic textiles, tyre wear, deteriorating plastic objects and intentionally small particles in some products. There was no single event that introduced them: their release follows many products through manufacture, use and disposal. [20]

UNEP describes the benefits and pollution trade-offs of agricultural plastics, including films used to retain moisture and protect crops. A move away from pesticides should therefore consider the materials used as alternatives, too. Replacing one input with another does not remove the need to evaluate its consequences. Origin story: agricultural plastic sources

For a gardener, this suggests a practical materials plan: inspect covers and irrigation lines, remove deteriorating fragments, keep litter out of compost and avoid leaving damaged plastic to crumble into a bed. These are sensible pollution-prevention steps. They have not been shown here to produce a specified reduction in human tissue concentrations.

Microplastics, pesticide residues and PFAS should not be treated as interchangeable. One term describes particles; another describes agricultural chemical residues; PFAS describes a broad chemical family. Products may connect these issues, but one test or risk estimate cannot stand in for all three.

8. How much plastic has actually been reported in human bodies?

Human studies have reported polymer signals or particles in several tissues and fluids. The numerical results below are study-specific. They cannot be added together to calculate an average person’s “total plastic load”, because they use different tissues, size thresholds and methods.

The brain figure is a reported tissue concentration, not a verified estimate for every living person’s brain. The paper’s authors acknowledge possible over- and under-estimation, including interference from residual biological material. A formal Matters Arising article subsequently questioned contamination controls and validation. Results and discussion; Figure 1 Read the authors' institutional abstract of the critique

The original investigators also published a reply addressing those concerns and acknowledging uncertainty in current detection methods. The exchange is a scientific dispute, not a retraction. Both sides belong in the source record; the reported concentrations should be read with the methodological debate attached. Published reply, 13 November 2025

For that reason, this article does not convert the result into a “spoonful per brain” claim or suggest it proves dementia is caused by plastic. Tissue detections and disease causation are separate questions. The reported medians also do not establish that the same individual’s burden increased between 2016 and 2024.

Why the laboratory disagreement matters

In a 2025 method-validation study, University of Queensland researchers found that natural material could interfere with polyethylene and PVC identification by pyrolysis–GC/MS in blood. Some apparent detections were inconsistent between replicates. They concluded that the method was not then suitable for identifying those polymers in biological samples without resolving the interference. Sections 3.3 and 3.3.1

This does not demonstrate that no plastic ever enters a person. It means that a precise concentration needs stronger validation than a familiar-looking chemical signal. In January 2026, UQ reported a proposed framework from 30 scientists across 20 institutions, emphasising contamination controls and confirmation by methods that work in different ways. [28]

That is a scientifically productive response: improve the measurements, report uncertainty and test whether independent methods agree. Concern about pollution should make the evidence standard stronger. Otherwise, an exaggerated number can distract from environmental releases that are already worth preventing.

A cardiovascular association worth investigating

The adjusted hazard ratio in this study was 4.53, with a 95% confidence interval of 2.00–10.27. A hazard ratio accounts for event timing and model adjustment; it is not the same calculation as dividing the two percentages in the graph. Residual confounding, selection and analytical concerns prevent a causal conclusion. Results and Discussion Subsequent correspondence

The participants already had carotid disease requiring surgery. This graph therefore cannot tell a healthy reader their personal chance of an event, or how much it would change if they altered food packaging. It identifies a signal for further study, not a validated household risk calculator.

Particles and associated chemicals need separate assessment

WHO’s 2022 review considers particles themselves alongside the polymers’ constituent chemicals, additives, contaminants carried on particles and associated biological material. Those are different potential hazards. The review identifies research needs and covers literature through December 2021; it is useful background rather than a complete account of the newer human studies above. Report overview and scope

A particle’s size, composition and surface properties can change which biological questions matter. A finding for one experimental material cannot be assumed to apply equally to every fragment in food or dust. Likewise, evidence about a plastic additive does not automatically establish the health effect of the particle carrying it. Reliable risk estimates need the material, exposure and relevant outcome to be connected.

The defensible conclusion is that environmental exposure is real, human measurements are being investigated, and some observational findings warrant attention. We do not yet have a universally accepted conversion from everyday exposure to a predictable disease risk or an established “safe body burden” covering all plastic particles.

9. Turn the evidence into a practical food-growing plan

Uncertainty does not require inaction. It calls for actions whose benefits and limits we can explain. Keep eating vegetables and fruit, reduce avoidable pollution, learn how food is grown and support the farmers who feed the community. Australian healthy-eating guidance continues to include vegetables and fruit as central parts of the diet. [36]

A household garden can give you direct control over what you deliberately spray on your own crop and a record of when it was applied. It cannot control every contaminant in air, water or soil. A small, well-managed garden is a realistic starting point; complete self-sufficiency is not a prerequisite.

Queensland’s waterwise gardening guidance recommends planning around the site’s soil, sun, microclimate, water supply and maintenance. Those fundamentals can make a small garden more manageable. Choose a scale you can maintain through hot weather and holidays, rather than planting more than you can water or harvest. [35]

If a pesticide is needed, check that the product is permitted for the edible crop and follow the label, including rate, protective measures and withholding period. WHO includes home gardeners in its advice on responsible use. Home-made or “natural” treatments should not be assumed harmless simply because of their origin. [32]

Wash produce under running water before eating it. FSANZ advises against soap, detergents and disinfectants on food. Washing and peeling can reduce some pesticide intake, but cannot guarantee removal of every residue or contaminant. Keep food hygiene and pollution prevention as separate, complementary tasks. [34] [32]

Use GardenBuddy to make the learning useful

Good records turn one season’s experience into the next season’s plan. Write down what you planted, what the weather did, what problems appeared, how you responded and what you harvested. That record also helps when asking a grower or experienced neighbour for advice.

Explore the GardenBuddy shop for the Garden Year 2027 planner and diary, with seven Australian climate-zone editions. It combines monthly sowing, planting and picking guidance with room to record what actually happened. Choose the edition for your growing conditions. [37]

Prefer to keep your garden online? Join GardenBuddy or compare subscription plans. The current offering includes a Free level, with Starter and Pro options for additional records and features. Check the plan page for current inclusions and terms. A subscription is a planning tool, not a medical intervention or a promise of contaminant-free food. [38]

Grow Together: community growing is already part of GardenBuddy

GardenBuddy’s Grow Together connects nearby growers in invitation-based groups to share surplus and compare what their gardens need. Joining an invited group is free; a Starter or Pro member can create a group and invite others. Members choose which beds to share. How Grow Together works

Start with a few neighbours or friends. One household might grow herbs, another leafy vegetables and another a crop suited to a larger space. Compare plans and swap what you have spare. This offers a practical way to participate even when one person has limited space, time or experience.

Seed swap is coming to GardenBuddy

Seed swap is planned as part of GardenBuddy, alongside Grow Together. It will extend the community-growing idea to exchanging seed. We will share availability and details through GardenBuddy as the feature develops.

When sharing seed, include the crop and variety if known, when it was collected and any relevant growing notes. Keep seed dry and clearly labelled. Describe uncertain identification or germination honestly so another gardener knows what they are receiving.

Connect the garden with the wider Dayboro community

Use Dayboro LocalBuddy to connect with the wider local community, introduce people to GardenBuddy and encourage more households to start growing. Keep the growing groups and seed-swap activity centred in GardenBuddy. Helping a neighbour establish one edible container or bed is a useful first project.

Support nearby farms alongside the home garden. Ask what is in season, how pests are monitored, what treatments are used when necessary and how produce is handled. Respect that farmers face weather, crop losses and financial constraints. Consistent local purchasing and practical support can make the conversation more useful than a demand for an impossible guarantee.

Where neighbours organise swaps or working bees, agree on costs, watering, access and responsibility in advance. Share accurate growing notes with seedlings and keep material clean. The objective is a durable habit of learning and helping, not a one-off burst of enthusiasm followed by abandoned beds.

At the wider-system level, ask retailers and regulators for accessible methods, concentrations, timely monitoring and clear explanations of follow-up. Ask that farmers have support to trial workable alternatives and measure their outcomes. Transparent evidence and viable farming belong together.

What to ask for when a test raises a concern

Ask for the measured concentration, the unit, the crop and the date. Ask which legal standard and residue definition were applied, whether the result was confirmed, and whether the regulator has reached a conclusion. If the public message is about health, ask which consumption scenario and health-based guidance value were used.

For a human measurement, ask whether the method identified the chemical or particle directly, what controls excluded contamination, and whether the result was repeated. Ask whether the study measured an exposure marker, a biological change or an actual health outcome. These questions make the discussion more precise without requiring every reader to become a laboratory scientist.

Keep the response proportionate to what is known. A confirmed compliance problem needs investigation and corrective action. An uncertain analytical result needs better testing. A robust association needs further work on causation and prevention. In each case, public reporting should explain the next step and what would change the conclusion.

References and exact locations

Numbers link directly to the sources used. Page numbers refer to the linked PDF, with journal pages supplied where useful. A source’s presence here does not imply endorsement of GardenBuddy.

1. Pesticide Action Australia, Australia's Residue Report 2026. How to read this report; Laboratory & Accreditation; Prohibited residues. Public summary, not the underlying laboratory package.
2. APVMA, Understanding isocycloseram and Maximum Residue Limits, 22/09/2026. What an MRL is; How the APVMA assesses food safety; What about PFAS. Substance-specific conclusions must not be generalised.
3. ABARES, Australian vegetable-growing farms survey. Table 18: three-year averages for 2015–16 to 2017–18, in 2018–19 AUD. Historical farm costs, not current retail prices.
4. Oates et al., Environmental Research 132 (2014), 105–111. Abstract: Methods, Results and Conclusions; Study design. DOI: 10.1016/j.envres.2014.03.021.
5. Hyland et al., Environmental Research 171 (2019), 568–575. PDF page 4 / journal page 571, Table 2; PDF page 5 / journal page 572, Figure 1 and section 3.4. Methods on PDF pages 2–3. DOI: 10.1016/j.envres.2019.01.024.
6. CDC, Biomonitoring: Population Exposures. Explains that a blood or urine detection alone does not establish disease.
7. Bouchard et al., Environmental Health Perspectives 119 (2011), 1189–1195. PDF page 4 / journal page 1192, Discussion and Table 2; PDF page 5 / journal page 1193, Figure 1. DOI: 10.1289/ehp.1003185.
8. ATSDR, Public Health Statement: Pyrethrins and Pyrethroids. How they enter and leave the body; rapid metabolism and excretion, with qualifications.
9. ATSDR, PFAS Information for Clinicians: Properties. Properties of well-studied PFAS, including half-lives. Not a half-life catalogue for every PFAS pesticide.
10. ATSDR, How PFAS Impacts Your Health. Health effects and named substances associated with each endpoint.
11. EFSA, Cumulative risk assessment of pesticides: FAQ, 29/04/2020. Questions 1–3: common-effect groups, initial results and the monitored populations. Does not assess this Australian survey.
12. European Commission, Chlorpyrifos & Chlorpyrifos-methyl. Why the Commission proposed non-renewal; 2020 decision and human-health grounds.
13. APVMA, Chlorpyrifos chemical review. Final regulatory decision and implementation tables. Current use requires specific label/permit checks.
14. APVMA, Chlorpyrifos final assessment: use summary, October 2024. PDF page 2 onwards: crop/host, pest and assessment outcome; an approval for one use does not authorise all crops.
15. European Commission Implementing Regulation (EU) 2019/1090. Page 1, recital 9: dimethoate and omethoate genotoxicity concerns, plus other assessment concerns.
16. APVMA, Dimethoate chemical review. 2017 final decision: agricultural labels varied and home-garden products cancelled. Historical use lists are not a current permission check.
17. APVMA, Chemicals prioritised for reconsideration, updated 03/06/2026. Table 1: planned 2027 commencement for dimethoate/omethoate reassessment; a forecast, not a completed review.
18. European Commission, Neonicotinoids. 2018 outdoor restrictions for bee risks; subsequent expiry of three approvals after renewal applications were withdrawn.
19. European Commission, How EU rules keep pesticides safe for human health. Hazard exclusions, exceptions and use-specific exposure assessment.
20. UNEP, Microplastics in wastewater: towards solutions, 20/03/2020. Weathering, tyres, textiles and intentionally small particles. No global source percentages are inferred for human bodies.
21. UNEP, How plastic is infiltrating the world's soils. Agricultural plastics, including mulch films and irrigation materials; pathways into soil.
22. Leslie et al., Environment International 163 (2022), 107199. Abstract: 22 volunteers, size threshold and mean quantifiable polymer mass. DOI: 10.1016/j.envint.2022.107199.
23. Ragusa et al., Environment International 146 (2021), 106274. Abstract and Results: six placentas; three fragments identified as polypropylene, nine by pigments only. DOI: 10.1016/j.envint.2020.106274.
24. Nihart et al., Nature Medicine 31 (2025), 1114–1119. Figure 1 and Results and discussion; Methods, Human tissue samples and Py-GC/MS detection. Read with the formal methodological challenge below.
25. Monikh et al., Challenges in studying microplastics in human brain, Nature Medicine (2025). Author institution's abstract of the Matters Arising, published 13/11/2025; DOI: 10.1038/s41591-025-04045-3. Full publisher text was not accessible during review.
26. Campen et al., Reply to: Challenges in studying microplastics in human brain, Nature Medicine 31 (2025), 4036–4037. Opening passage acknowledges uncertainties and identifies the methodological concerns addressed. Publisher preview reviewed; the complete reply was not accessible.
27. Rauert et al., Environmental Science & Technology 59 (2025), 1984–1994. Sections 3.3 and 3.3.1: blood results and PE/PVC interference; section 3.2 for method limits. DOI: 10.1021/acs.est.4c12599.
28. University of Queensland, Proposed standards to identify and measure microplastics, 27/01/2026. First-party account of the proposed measurement framework; multiple-method confirmation and contamination control.
29. Marfella et al., New England Journal of Medicine 390 (2024), 900–910. Results: Cardiovascular events; Figure 4; Methods: assay and outcome definitions; Discussion: causality and generalisability. DOI: 10.1056/NEJMoa2309822.
30. NEJM correspondence, Microplastics and Nanoplastics in Atheromas (2024). Correspondence pp. 1726–1728 raises contamination concerns. Publisher abstract/search excerpt accessible; not an independent reanalysis.
31. WHO, Dietary and inhalation exposure to nano- and microplastic particles and potential implications for human health (2022). Report overview: exposure through food, water and air; particle and associated-chemical hazards; research needs. Review covers literature through December 2021, not all evidence through 2026.
32. WHO, Pesticide residues in food, 15/09/2022. Exposure, crop protection and home use; washing and peeling can reduce intake.
33. FSANZ, Australian Total Diet Study. 25th study summary: food collected 2013–2014, published 2019, prothiofos follow-up. Later studies have different scopes.
34. FSANZ, Food safety basics. Washing fruit and vegetables under running water; no soap, detergent or disinfectant.
35. Queensland Government, Waterwise gardening. Site, soil, microclimate, water supply and maintenance planning.
36. Australian Government, Eating well. Dietary role of vegetables and fruit; the article does not recommend reducing their consumption.
37. GardenBuddy, Garden Year 2027 planner and diary. Product description checked 15/10/2026; seven climate editions. No guaranteed health outcome is claimed.
38. GardenBuddy, Pricing and plan inclusions. Free, Starter and Pro features checked 15/10/2026. Current prices and terms remain on the destination page.
39. Dayboro.au, Explanation of Dayboro LocalBuddy, 10/09/2026. First-party description of the wider community platform; gardening groups and the planned seed swap belong to GardenBuddy.
40. GardenBuddy, Grow Together. How it works; What it costs; How to join. Existing invitation-based groups, free to join; Starter or Pro to create. Seed swap development separately confirmed by the project owner in this conversation.

Editorial scope: a researched public-facing synthesis, not an independent laboratory audit or systematic review. No individual commenters are identified. Product details and regulatory information should be rechecked if republishing later.