Playing Poison: What's on the Swings and How to Protect Your Child

Imagine you could see, under a microscope, everything your child touched at the playground today. The swing. The slide. The wooden post they wrapped their hands around before running off.

Most parents assume the invisible things are safe. Water. Air. The ground children sit on and the equipment they climb. These feel neutral. Background. Just there.

A report published in January 2026 by the Pesticide Action Network UK tested playground surfaces directly - swings, slides, floors - across thirteen playgrounds in England. Eight tested positive for glyphosate or its breakdown product AMPA. Not near the playground. On the equipment itself.

The one area that came back completely clean was Hackney. The borough that banned glyphosate from its parks and green spaces in 2021. One policy decision. A few years ago. Visible in the data today.

That tells us something important. This is not an unsolvable problem.

THE SAFETY CLAIM HAS A CONVENIENT HOLE IN IT

This is the line the industry has always relied on. Glyphosate works by blocking the shikimate pathway - one that exists in plants and bacteria but not in human cells. So we're safe, apparently.

What that argument leaves out entirely is both simple and deeply troubling.

Human cells may not have the shikimate pathway but our gut bacteria do.

Think of your child's gut bacteria - the microbiome - as a vast, busy city. Trillions of inhabitants, each with a specific job. The beneficial species - Lactobacillus, Bifidobacterium, the bacteria that produce the short-chain fatty acids that hold the gut lining together like mortar between bricks - rely on the shikimate pathway to survive. Glyphosate hits them directly and mercilessly. The more opportunistic residents - Clostridia, the pathogens - tend to be more resistant. So glyphosate doesn't randomly reduce bacterial diversity. It selectively clears out the neighbourhoods we most depend on.

Dr Stephanie Seneff, senior research scientist at MIT's Computer Science and Artificial Intelligence Laboratory, spent years following this trail at considerable professional cost - the kind of cost that tends to discourage other researchers from asking the same questions. In 2013, she and colleague Anthony Samsel published a landmark paper in the journal Entropy connecting glyphosate's disruption of gut bacteria and CYP enzyme function to a range of modern conditions including gastrointestinal disease, autism, depression and cancer.1 The work was widely dismissed. The mechanism it described has not been.

WHY OUR CHILDREN ARE NOT THE SAME AS EVERY OTHER CHILD IN THAT PLAYGROUND

Every child on that equipment is being exposed. But not every child responds the same way.

For children with autism, PANS and PANDAS, glyphosate doesn't land on a blank slate. It lands on a system already working harder than it should, with fewer resources than it needs.

When glyphosate disrupts beneficial gut bacteria, the gut lining loses its integrity. Gaps appear. Bacterial fragments - lipopolysaccharides - leak through into circulation and drive immune activation. In a child whose immune system is already dysregulated, that is not a minor event.

Glyphosate is also a potent chelator of minerals - it binds to them and makes them unavailable to the body. The minerals most affected include manganese, zinc, cobalt, iron and magnesium.2 Not peripheral nutrients. The foundation of everything your child's body depends on.

HOW ONE PROBLEM QUIETLY BECOMES FIVE

Your child's stomach lining contains specialised cells that do two jobs. They produce hydrochloric acid - which breaks down protein and releases minerals from food - and intrinsic factor, which escorts B12 to where it can be absorbed. Both depend on zinc. When glyphosate depletes zinc, both drop.²

That matters more than it sounds.

Low stomach acid means food isn't properly broken down. In children who eat a lot of dairy, incompletely digested casein produces compounds with a mild opioid effect - which drives the craving for more dairy. Calcium from dairy and iron are essentially competing for the same taxi. There is only one vehicle and calcium almost always wins. So the iron waits. And waits. At the same time, low stomach acid means iron isn't even in the right form to board in the first place. And without adequate copper, any iron that does make it into storage cannot be released back out.

The child ends up iron deficient. Not because they aren't eating iron. Because every step in the process of getting it into the body has broken down at the same time.

Meanwhile, without intrinsic factor, B12 can't be absorbed regardless of what they eat. Low B12 impairs methylation - the process the body uses to switch genes on and off, make neurotransmitters and clear toxins. In children who already have genetic variants that make methylation harder - and a significant proportion of our kids do - this is not a minor additional burden.

One loop, feeding another, feeding another.

HERE IS WHERE WE GET REALLY NERDY - STAY WITH ME, IT'S WORTH IT

Every cytochrome P450 (CYP) enzyme in the body has an iron-containing haem group at its active site. Iron is structural. Without it, the enzyme cannot function.

CYP enzymes detoxify every environmental chemical the body encounters - including glyphosate itself. They also activate vitamin D, produce bile acids, and metabolise hormones.

Seneff's paper identified glyphosate's potential suppression of CYP activity as one of its most significant and most overlooked mechanisms of harm.1 A body that cannot clear toxins accumulates them. This is one reason why progress can stall despite everyone's best efforts. The detoxification capacity itself is compromised - and until that is addressed, other interventions will only go so far.

Some children carry two copies of a gene variant affecting SOD2 - rather than one - which makes the impact significantly greater. This is more common than most people realise in the children we work with. SOD2 is the mitochondria's primary defence against oxidative damage - think of it as the security system inside your child's cells, neutralising the damaging molecules that energy production generates. It needs manganese to work. Glyphosate chelates manganese - meaning it binds to it and pulls it out of reach. The hit lands exactly where these children are already most vulnerable.

These are not separate problems. They are one cascade, initiated at the gut, amplified through mineral depletion, and ending in a body that cannot adequately protect or repair itself.

WHAT YOU CAN ACTUALLY DO

Understanding the biology is one thing. But if you've read this far, you want to know what to do with it. These are the changes that matter most and that most families can start on now. None of them requires a prescription. Some of them cost almost nothing.

WATER. START HERE

Glyphosate has been detected in UK tap water. A solid carbon block filter or reverse osmosis system removes it. For a child whose detoxification capacity is already compromised, this is the single most impactful immediate change most families can make.

REDUCE THE LOAD ON YOUR PLATE

Buying organic produce reduces pesticide exposure significantly and is worth doing where you can. We also know that for many families the cost makes it impossible across the board - so prioritise what your child eats most and in the largest quantities, and don't stress about the rest.

For everything else, there is something sitting in most kitchen cupboards right now that actually works. A 2017 University of Massachusetts study found that soaking produce in bicarbonate of soda and water for 12 to 15 minutes removed up to 96% of surface pesticide residue - significantly outperforming both tap water and bleach.3 One teaspoon to two cups of water. Soak, scrub gently, rinse well. Pesticides that have already penetrated the skin won't shift, but for surface residue this is one of the most effective and cheapest things you can do.

SUPPORTING STOMACH ACID - GENTLY AND REALISTICALLY

Bitter herbs before meals stimulate gastric acid production via the vagus nerve. Two options well tolerated by children in practice:

Herb Pharm Dandelion Glycerite - alcohol-free, glycerine-based, mild tasting. A few drops in water, five to ten minutes before eating.

Nature's Answer Dandelion Root Alcohol Free - same format, similarly tolerated.

Fresh lemon juice in a small amount of water before meals works well for children who resist anything herbal.

For children eating significant processed food and refined carbohydrates, B1 (thiamine) deserves particular attention. High carbohydrate diets deplete thiamine fast and B1 is a direct co-factor for HCl production. Egg yolks, red meat and liver are the most practical sources.

IRON - FROM FOOD, THROUGH THE RIGHT DOORS

Red meat and liver deliver haem iron, which the body absorbs through a completely separate route from plant-based iron and is far less disrupted by calcium. Keep iron-rich meals at least two hours away from dairy - that gap alone makes a real difference. Liver eaten weekly does two jobs at once, supplying both iron and copper. Without adequate copper, iron simply cannot be released from storage, and supplementing iron without it can send you round in circles.

If your child won't eat meat, plant-based iron is still worth including - but pair it with vitamin C at the same meal. Studies show this can increase absorption from plant sources several-fold.4 A squeeze of lemon over dark leafy greens, or some berries alongside. Small detail, significant difference.

GLYCINE AND BONE BROTH - WITH IMPORTANT CAVEATS

Glycine is the amino acid glyphosate structurally mimics. Bone broth, skin-on poultry and slow-cooked meats are the richest food sources. Glycine powder is also available as a supplement.

Two caveats. Bone broth is high in histamine - introduce slowly if mast cell activation is part of your child's picture. And glycine can convert to oxalate in children with an oxalate accumulation tendency, which is more common in this community than most people realise. If you are unsure, read our dedicated piece first: The Impact of Oxalates on Symptoms of Autism, PANDAS and PANS.

SUPPORTING LIVER DETOXIFICATION

Dandelion earns its place twice - it stimulates stomach acid and supports the liver directly. Milk thistle is the most accessible liver supplement, well researched and widely available. More complex herbal formulations combining milk thistle and dandelion with liquorice root, grape seed extract, bilberry, elderberry, rosehips and skullcap can be highly effective - worth discussing with your practitioner to find the right fit for your child.

Eggs support glutathione production via sulphur-containing amino acids - practical, well tolerated, no histamine or oxalate concerns. Rosemary added to cooked food supports what is known as the Nrf2 pathway - essentially the body's master switch for turning on its own detoxification and antioxidant genes. It is one of the most powerful things the body can do for itself, and rosemary quietly activates it. It goes in everything from roast chicken to scrambled eggs and requires no persuasion from anyone.

Broccoli deserves its own moment here - because most people are preparing it in a way that destroys most of what makes it valuable.

It contains a compound that, when you chop or chew it, gets converted by an enzyme into something called sulforaphane. Sulforaphane is one of the most studied natural activators of that same Nrf2 detoxification pathway we mentioned earlier - hundreds of studies, oxidative stress, inflammation, neurological protection. Remarkable stuff.

The problem is the enzyme is destroyed by heat. Put broccoli straight into a hot pan and the conversion never happens. The fix is simple - chop it, leave it on the board for at least ten minutes, then cook it lightly. That gap is enough for the enzyme to do its work. Once sulforaphane has formed it is heat stable, so you won't lose it.5

Frozen broccoli is a different story. Most commercial frozen broccoli is blanched before freezing, which kills the enzyme entirely. The workaround is to add a pinch of mustard powder, some finely chopped radish, rocket or watercress after cooking. These contain the same enzyme and can restart the conversion even after heat.6,7

One small preparation detail. Genuinely significant difference in what reaches your child's cells.

And then there is one of the simplest interventions of all. A warm Epsom salt bath two to three times a week. Dr Rosemary Waring, Dr Rosemary Waring, a toxicologist at Birmingham University, found that up to 73% of autistic children had reduced plasma sulphate and low activity of phenol sulphotransferase - the enzyme that attaches sulphate to toxins and hormones so they can be cleared from the body.8 Sulphate absorbs poorly from the gut but well through the skin. Two cups in a warm bath, soaked for at least twenty minutes and not rinsed off, raises blood sulphate levels meaningfully. Inexpensive, safe, and something most children genuinely enjoy. And glyphosate itself interferes with the sulphation pathway - making this particularly relevant for everything we have been discussing here.

THEN WRITE THE LETTER

All of these changes matter. None of them is the whole answer.

The problem is not only in your kitchen. It is in the park at the end of your road, on the swing your child touched this morning, in the hands they put in their mouth on the way home.

The PAN UK report showed the only clean playgrounds in the study were in a borough that made one policy decision a few years ago.9 Hackney banned glyphosate. Hackney's playgrounds tested clean. The science and the policy lined up, and children benefited.

There is already a Private Members’ Bill in the House of Commons, tabled by Siân Berry MP, that would ban pesticide use by English councils. Your MP can support it. Your local council can be asked directly: what pesticides do you use in our parks, and what is your phase-out plan?

This one is ours to fight. The evidence is there. The letter takes five minutes.

IMPORTANT

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis or treatment. Always consult with medical doctors or qualified functional medicine practitioners before introducing any new supplement, test, or intervention.

If this has raised questions about your child, we'd love to help you find some answers.

REFERENCES

1. Samsel A, Seneff S. Glyphosate's Suppression of Cytochrome P450 Enzymes and Amino Acid Biosynthesis by the Gut Microbiome: Pathways to Modern Diseases. Entropy. 2013;15(4):1416-1463. doi:10.3390/e15041416.

2. Samsel A, Seneff S. Glyphosate, pathways to modern diseases II: Celiac sprue and gluten intolerance. Interdisciplinary Toxicology. 2013;6(4):159-184. doi:10.2478/intox-2013-0026.

3. He L, Zhao Y, Zhou Y et al. Evaluation of Washing Agents for Pesticide Residue Removal from Apples. Journal of Agricultural and Food Chemistry. 2017. doi:10.1021/acs.jafc.7b03118.

4. Lynch SR, Cook JD. Interaction of vitamin C and iron. Annals of the New York Academy of Sciences. 1980;355:32-44. doi:10.1111/j.1749-6632.1980.tb21325.x.

5. Wu Y, Shen Y, Wu X et al. Hydrolysis before stir-frying increases the isothiocyanate content of broccoli. Journal of Agricultural and Food Chemistry. 2018;66(6):1509-1515. doi:10.1021/acs.jafc.7b05913.

6. Vermeulen M, Klöpping-Ketelaars IWAA, van den Berg R, Vaes WHJ. Bioavailability and kinetics of sulforaphane in humans after consumption of cooked versus raw broccoli. Journal of Agricultural and Food Chemistry. 2008;56(22):10505-10509. doi:10.1021/jf801989e.

7. Dosz EB, Jeffery EH. Modifying the processing and handling of frozen broccoli for increased sulforaphane formation. Journal of Food Science. 2013;78(9):H1459-H1463. doi:10.1111/1750-3841.12221.

8. Waring RH, Klovrza LV. Sulphur Metabolism in Autism. Journal of Nutritional and Environmental Medicine. 2000;10:25-32. doi:10.1080/13590840050000861.

9. Pesticide Action Network UK. Playing with Poison: Pesticide Residues on Children's Playgrounds. January 2026. Available at: pan-uk.org.