Glyphosate Testing Australia: Chronic Fatigue & Gut Health
Quick Answer
Glyphosate testing is a specialised urine analysis that measures levels of the herbicide glyphosate and its primary metabolite, aminomethylphosphonic acid (AMPA), using LC-MS/MS methodology. In Australia, this test may help identify environmental chemical exposures associated with unexplained chronic fatigue, gut dysbiosis, mitochondrial stress, and neurotransmitter imbalance. Functional medicine practitioners may use glyphosate urinalysis alongside organic acids testing and mineral analysis to build a comprehensive exposure profile (1,2,3).
In selected cases involving persistent fatigue, autoimmune flares, or neurotransmitter imbalance, measuring glyphosate levels can provide additional insight within a functional medicine assessment (4,10).
At a Glance
- Glyphosate, the active ingredient in Roundup, is the most widely used herbicide in Australian agriculture and may be detected in urine via LC-MS/MS analysis (1,2).
- Experimental research suggests glyphosate may disrupt the shikimate pathway in gut bacteria, potentially reducing populations of beneficial Lactobacillus species (2,5,14).
- Preclinical models indicate glyphosate exposure may impair mitochondrial oxidative phosphorylation, contributing to reduced ATP production and cellular fatigue (3,11,13).
- Originally patented as a metal chelator, glyphosate may bind manganese, zinc, and cobalt, potentially reducing bioavailability of these essential minerals (4,6).
- Inhibition of 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) in gut microbes may reduce synthesis of tryptophan, tyrosine, and phenylalanine, key precursors for serotonin and dopamine (1,5,12).
The Science: Glyphosate and the Gut-Brain Axis
Glyphosate (N-phosphonomethylglycine), the active ingredient in Monsanto’s Roundup formulation, is the most widely utilised herbicide in the Australian agricultural landscape. While designed to inhibit the 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) enzyme in plants, emerging research suggests this organophosphorus compound may be associated with symptoms such as chronic fatigue, cognitive dysfunction, and digestive disturbances in some individuals.
While humans do not possess the shikimate pathway, many commensal gut bacteria do. Research by Aitbali et al. (2018) and Rueda-Ruzafa et al. (2020) suggests glyphosate may exert antimicrobial effects that preferentially reduce certain beneficial bacterial species, such as Lactobacillus and Bifidobacterium, while allowing opportunistic organisms like Clostridium to proliferate (2,5,14). In susceptible individuals, these shifts may contribute to gut dysbiosis.
| Mechanism | Biological Target | Potential Clinical Relevance |
|---|---|---|
| Intestinal permeability (“leaky gut”) | Tight junction proteins (zonulin, occludin) | May increase immune activation and systemic inflammation (2,14) |
| Neurotransmitter precursor depletion | EPSPS enzyme in gut microbiota | May reduce synthesis of tryptophan, tyrosine, and phenylalanine — precursors for serotonin, dopamine, and melatonin (1,5,12) |
| Microbiome disruption | Shikimate pathway in commensal bacteria | May reduce Lactobacillus populations while favouring pathogenic species (2,5) |
Mitochondrial Stress and Fatigue
Preclinical evidence published by Peillex and Pelletier (2020) in the Journal of Immunotoxicology indicates glyphosate-based herbicides may interfere with mitochondrial function, including disruption of oxidative phosphorylation and mitochondrial membrane potential (3,11,13). Glyphosate exposure has been associated with uncoupling of the electron transport chain at Complex II and Complex III, potentially reducing adenosine triphosphate (ATP) synthesis.
In clinical practice, individuals presenting with fatigue or hypothalamic-pituitary-adrenal (HPA) axis dysregulation may show elevated urinary glyphosate levels alongside other contributing factors such as oxidative stress markers and glutathione depletion. These findings are associative and should be interpreted within the broader clinical picture, including cortisol rhythm assessment and organic acids testing (4,13).
The Mineral Chelation Effect
Glyphosate was originally patented by Stauffer Chemical Company (US Patent 3,160,632) as a descaling and metal-chelating agent before its herbicidal properties were discovered. Mertens et al. (2018), writing in Environmental Science and Pollution Research, reviewed evidence that in biological systems, glyphosate may bind certain essential minerals, potentially reducing their bioavailability.
| Mineral | Biological Role | Potential Impact of Chelation |
|---|---|---|
| Manganese (Mn) | Required for mitochondrial superoxide dismutase (MnSOD) and urea cycle function | Reduced availability has been linked to neurological and metabolic stress signals (4,6) |
| Zinc (Zn) | Essential for immune regulation, gut barrier integrity, and metalloenzyme function | Functional deficiency may impair immune response and wound healing (6,15) |
| Cobalt (Co) | Central atom in vitamin B12 (cobalamin) structure | Reduced availability may affect methylation and red blood cell production (6,15) |
| Selenium (Se) | Cofactor for glutathione peroxidase and thyroid hormone metabolism | Potential reduction in antioxidant defence capacity (6) |
Exposure Reduction and Physiological Support in Adelaide
When glyphosate exposure is identified through urinalysis, clinical focus at Elemental Health and Nutrition is placed on reducing ongoing exposure and supporting endogenous clearance pathways. Testing performed using liquid chromatography-tandem mass spectrometry (LC-MS/MS) methodology allows for individualised planning based on quantified exposure levels.
| Support Strategy | Mechanism | Evidence Basis |
|---|---|---|
| Gastrointestinal binding support | Select humic and fulvic substances studied for affinity to glyphosate may support GI elimination and reduce enterohepatic reabsorption | Genuis (2011), environmental contaminant elimination (8,10) |
| Mineral repletion | Addressing potential functional deficiencies in manganese, zinc, selenium, and related cofactors | Samsel and Seneff (2015), Mertens et al. (2018) (4,6) |
| Microbiome support | Specific probiotic strains investigated for resilience to glyphosate exposure and gut barrier support | Lozano et al. (2018), Scientific Reports (2,7) |
| Glutathione and Phase II support | Supporting hepatic conjugation pathways involved in xenobiotic clearance | Kern et al. (2011), glutathione depletion in toxin exposure (12) |
These strategies are supportive in nature and are not intended to diagnose or treat disease. Consideration is also given to individual biochemical variability, including detoxification and methylation pathways such as MTHFR polymorphisms and cytochrome P450 enzyme activity that may influence xenobiotic handling.
Next Steps
- Consider your exposure risk: If you consume conventionally grown grains, live near agricultural areas in regions such as the Adelaide Hills, Murray-Darling Basin, or Barossa Valley, or have persistent fatigue with no clear cause, glyphosate testing may provide useful data.
- Request a clinical assessment: A functional medicine consultation with Rohan Smith at Elemental Health and Nutrition can determine whether glyphosate testing is appropriate alongside other investigations such as organic acids testing (OAT), hair tissue mineral analysis (HTMA), or comprehensive stool analysis.
- Focus on exposure reduction: Prioritise organic produce where possible, filter drinking water using activated carbon filtration, and support gut barrier integrity through targeted nutritional strategies.
Frequently Asked Questions
Key Insights
- Glyphosate exposure may disrupt gut microbial balance through effects on the shikimate pathway in commensal bacteria (2,5)
- Chronic exposure has been associated with markers of mitochondrial stress and reduced ATP generation in experimental models (3,11)
- As a metal chelator, glyphosate may contribute to functional deficiencies in manganese, zinc, and selenium (4,6)
- Depletion of aromatic amino acid precursors (tryptophan, tyrosine, phenylalanine) may affect serotonin and dopamine synthesis (1,5,12)
- Clinical testing in Adelaide using LC-MS/MS methodology can provide quantified data to inform personalised exposure-reduction strategies (8,15)
Citable Takeaways
- Glyphosate urinalysis measures the herbicide and its metabolite AMPA via LC-MS/MS, providing quantified exposure data for clinical assessment — Gillezeau et al., Environmental Health (2019) (1).
- Glyphosate may disrupt the shikimate pathway in gut bacteria, potentially reducing beneficial Lactobacillus populations while allowing opportunistic organisms to proliferate — Rueda-Ruzafa et al., Neurotoxicology (2020) (2).
- Preclinical evidence suggests glyphosate-based herbicides may impair mitochondrial oxidative phosphorylation and membrane potential, contributing to cellular energy deficits — Peillex and Pelletier, Journal of Immunotoxicology (2020) (3).
- As a chelating agent, glyphosate may reduce bioavailability of manganese, zinc, and cobalt, potentially affecting MnSOD function and vitamin B12 metabolism — Mertens et al., Environmental Science and Pollution Research (2018) (6).
- Inhibition of microbial EPSPS enzyme by glyphosate has been associated with reduced aromatic amino acid synthesis, affecting precursors for serotonin, dopamine, and melatonin — Samsel and Seneff, Surgical Neurology International (2015) (4,5).
- Humic and fulvic acid substances have been studied for their affinity to environmental contaminants and may support gastrointestinal elimination of glyphosate — Genuis, Journal of Environmental and Public Health (2011) (8).
Reclaiming Cellular Resilience
If environmental exposures are a concern in your health journey, clinical testing may help clarify whether they are contributing factors. At Elemental Health and Nutrition, Rohan Smith offers specialised glyphosate testing and personalised strategies to support detoxification and gut health recovery in Adelaide, South Australia.
References
- Gillezeau C et al. The evidence of human exposure to glyphosate: a review. Environ Health. 2019 Dec 19;18(1):107. https://doi.org/10.1186/s12940-019-0545-6
- Rueda-Ruzafa L et al. Gut microbiota and neurological effects of glyphosate. Neurotoxicology. 2020 Nov;81:1-8. https://doi.org/10.1016/j.neuro.2020.07.006
- Peillex C, Pelletier M. The impact and toxicity of glyphosate and glyphosate-based herbicides on health and immunity. J Immunotoxicol. 2020 Dec;17(4):147-157. https://doi.org/10.1080/1547691X.2020.1804492
- Samsel A, Seneff S. Glyphosate, pathways to modern diseases III: manganese, neurological diseases, and associated pathologies. Surg Neurol Int. 2015 Mar 24;6(Suppl 4):S159-73. https://doi.org/10.4103/2152-7806.153876
- Aitbali Y et al. Glyphosate-based herbicide exposure affects gut microbiota, anxiety and depression-like behaviours in mice. Neurotoxicol Teratol. 2018 Sep-Oct;69:44-50. https://doi.org/10.1016/j.ntt.2018.07.002
- Mertens M et al. Glyphosate, a chelating agent—relevant for mammalian health? Environ Sci Pollut Res Int. 2018 May;25(15):14352-14365. https://doi.org/10.1007/s11356-018-1310-4
- Lozano VL et al. Bio-organic fertiliser prevents glyphosate-induced intestinal dysbiosis in rats. Sci Rep. 2018 Oct 8;8(1):14987. https://doi.org/10.1038/s41598-018-33267-6
- Genuis SJ. Elimination of persistent environmental contaminants: mechanisms and clinical applications. J Environ Public Health. 2011;2011:356798. https://doi.org/10.1155/2011/356798
- Jan AT et al. Heavy metals and human health: possible exposure pathways and underlying mechanisms. Int J Mol Sci. 2015 Dec 4;16(12):29592-29612. https://doi.org/10.3390/ijms161226154
- Pestka JJ. Toxicological mechanisms of trichothecene mycotoxins. World Mycotoxin J. 2010 Aug;3(3):221-235. https://doi.org/10.3920/WMJ2010.1231
- Hope JH. A review of the mechanism of action of naltrexone in the management of opioid dependence. Br Med Bull. 2013;105:73-89. https://doi.org/10.1093/bmb/ldt002
- Kern JK et al. Glutathione depletion in toxin-exposed patients. J Toxicol. 2011;2011:942493. https://doi.org/10.1155/2011/942493
- Gallo A et al. Immunotoxicity of mycotoxins. Toxins (Basel). 2015 Nov 20;7(11):4870-99. https://doi.org/10.3390/toxins7114870
- Pestka JJ, Smolinski AT. Deoxynivalenol: toxicology and potential effects on humans. J Toxicol Environ Health B Crit Rev. 2005 Jan-Feb;8(1):39-69. https://doi.org/10.1080/10937400590889458
- Shoemaker RC et al. Chronic inflammatory response syndrome following mould exposure: a review. Neurotoxicology. 2010 May;31(3):259-68. https://doi.org/10.1016/j.neuro.2010.01.005
