The Sticky Truth About Peanut Butter: How Could Aflatoxins Affect ADHD and Gut Health?

The Sticky Truth About Peanut Butter

How Could Aflatoxins Affect ADHD and Gut Health?

Peanut butter has earned its place as a household staple for good reason. It's affordable, satisfying, and packed with nutrients that support growth, metabolism, and even normal brain function. Peanuts and peanut butter are generally heralded as a healthy food as long as you don’t add too much sugar or other fats.  They are high in protein, monounsaturated fat, fiber  and many other micronutrients like niacin, magnesium, folate and vitamin E. Nutritional science often leans toward paying the closest attention to macronutrients therefore often overlooking the microscopic concerns that wreak havoc on our larger biological systems. What happens when a food that supplies the building blocks for healthy neurotransmitter function also carries the potential for exposure to compounds that can disrupt those same biological pathways? This dichotomy exists with a lot of the foods we eat.

What’s Really in the Jar

The problem is that is peanut butter can contain aflatoxins. While there are some safeguards in commercial peanut production in America to keep our intake of this down, (20 ppb) for susceptible individuals and high consumers it can potentially cause a lot of problems. The EU’s threshold is 2 ppb for reference. This won’t protect high volume consumers or small bodies with under developed immune systems and detoxification capacity.

Aflatoxin is only one form of mycotoxin, there are others but let’s focus on this one food, peanut butter, because I had two adult clients with this exposure recently. One with ADHD and the other with diarrhea we narrowed down to peanut butter consumption. NIH defines ADHD as a neurodevelopmental disorder characterized by inattention, hyperactivity and impulsivity. I think we all know what diarrhea is but clinically, it is defined as the passage of three or more loose or watery bowel movements a day.

When the Gut is Out of Balance

Chronic exposure to certain toxins can interfere with important biological processes, including methylation, mitochondrial energy production, and the gut-brain axis. Environmental toxins, aflatoxin being just one of thousands of compounds, may also alter the gut microbiome, contributing to dysbiosis and  therefor changes in microbial signaling. For genetically susceptible individuals, these disruptions could potentially influence catecholamine synthesis and signaling, including dopamine and norepinephrine, which play important roles in attention, executive function, and impulse control.

Gut dysbiosis and persistent, high-volume diarrhea can also create conditions that interfere with nutrient absorption, potentially leading to deficiencies. Our gastrointestinal tract does far more than digest food and absorb nutrients. Gut microorganisms participate in neurotransmitter production, metabolism, communicate with the brain, influence hormone regulation, and shape immune responses.  When the gut environment becomes disrupted, the consequences may extend beyond digestive symptoms, potentially affecting neurological, hormonal, and immune function as well.

It All Begins in the Soil

The fungi that produce aflatoxins are often already in the soil that the peanuts are grown in. Drought and heat can increase vulnerability because plant stress can change the ecosystem they are grown in. How a food is harvested and dried also impacts levels in all foods while storage conditions all impact fungal growth and therefore mycotoxin production. These are factors for which American consumers have little direct transparency. By this I mean, this information is not on the label.

Processing a food also has very little impact on the mycotoxin concentration. So we are left wondering how much is in the specific brand that we consume. For the additionally curious mind, you could go buy an ultraviolet light, head into a dark closet with your peanut butter jar and see what colors light up. Some strains emit a blue glow (Aflatoxin B)  and others green (Aflatoxin G). By no means is this diagnostic because other compounds also fluoresce under UV light. Nor does it tell us how much is in the food product but is an entertaining reminder of all the things we normally can not see that may effect our health. I did this several years ago and promptly threw out my fancy organic peanut butter I ground myself at the local health food store.

I didn't want to throw out the nutritional benefits of peanuts forever. That's when I discovered a loophole that commercial manufacturing bypasses: fermented peanut butter. By introducing specific beneficial bacteria or probiotic starters to the grinding process, microbial fermentation can actually degrade and neutralize aflatoxins, offering a potential clean way forward. Unfortunately, at the time of publication there do not appear to be any commercial fermented peanut butter manufacturers.

The most common dietary sources of aflatoxins, produced primarily by Aspergillus flavus and Aspergillus parasiticus, include:

Why Do Some People React Differently?

This is a hypothesis, not an established causal relationship but one worth considering as a contributor to neurological health.  It’s important to understand that everyone’s genetic susceptibility is different and they are also in different capacities to metabolize and eliminate toxic compounds.

This can lend its self to some people believing exposure is not a problem because their body may be able to clear a toxin until the mechanism for clearing becomes too overwhelmed. It’s easy to dismiss someone’s symptoms when you have a similar exposure without those same symptoms. Or their next-door neighbor eats way more peanut butter than they do. Bio-individuality is certainly a thing. Or we just don’t associate peanut butter consumption with a behavioral concern.

We humans will find a line of thinking or justification that aligns with whatever we are trying to prove. This article included.

What Does the Research Tell Us?

Until recently, much of the evidence connecting aflatoxins to neurological concerns came from animal studies. But human epidemiological research could begin to to add another dimension. A 2022 longitudinal study in Bangladesh associated chronic aflatoxin exposure with poorer cognitive and language development in young children. More recently, a 2026 study of Mexican adolescents found that higher aflatoxin exposure was associated with poorer working memory performance up to two years later.

Neither study established a causal relationship between aflatoxins and ADHD. However, these two study findings raise an important question: If dietary exposure to certain fungal toxins is potentially associated with changes in cognitive development, shouldn’t we be examining their potential impact on overall neurological function.

I suspect these exposures affect individuals differently, although the extent of their effects remains uncertain. Being aware that is a contributing factor in our overall health is what’s important. And to begin to ask different questions about our health. Think about the number of children out there eating peanut butter and perhaps even worse on a gluten-free, corn-based tortilla  every day who may be struggling with their behavior because they don’t feel very well without words to explain their struggle.

Local Food Solutions

Here's another reason to support your local farmer. Knowing who grows your food gives you the opportunity to ask questions about growing conditions, harvesting, drying, and storage practices. With peanuts, these details matter because environmental conditions and handling can influence aflatoxin contamination. Buying local doesn't guarantee safer peanuts, but it opens the door to greater transparency. Testing is still the best way to know for sure.

Supporting local agriculture is about more than keeping dollars in our communities. It's about rebuilding relationships with the people who grow our food, understanding the systems that truly sustain us, and taking greater responsibility for what ends up on our plates.

Back to Those Two Clients

In case you were wondering. My one client’s diarrhea resolved when she stopped eating a lot of peanut butter.  Was it the Aflatoxin in this case? In the absence of toxin and biome testing we can not be sure. The other, I’m still trying to convince that his toxin test should be taken seriously and at the very least reduce his intake or look at fermented peanut butter options. Do I need a double blind placebo controlled study to make this recommendation. I don’t believe so.

As alway remember, that the story of your health begins long before food reaches your plate. These are the reflections from soil to cell.

If you are interested in a Discovery Call with me to discuss your particular detoxification concern, it cost nothing but time. Click here——> https://www.healthislocal.com/cellular-detox-discovery-call

References

1. Aflatoxin B1 alters dopamine and serotonin concentrationsm https://pubmed.ncbi.nlm.nih.gov/2412309/. Aflatoxin B1 can alter neurotransmitter-metabolizing enzymes https://pubmed.ncbi.nlm.nih.gov/2499275/

2. Aflatoxin B1 can induce dopaminergic neurotoxicity https://pubmed.ncbi.nlm.nih.gov/37373086/

3. Improving nutritional quality and aflatoxin detoxification of peanut meal by co-fermentation with Weizmannia coagulans, Bacillus subtilis, and supplemented enzymes https://pmc.ncbi.nlm.nih.gov/articles/PMC12362912/

4. Epigenetics and ADHD: Reflections on Current Knowledge, Research Priorities and Translational Potential https://pmc.ncbi.nlm.nih.gov/articles/PMC7613776/

5. Mycotoxins in European Union Regulations (2023-2025) https://pmc.ncbi.nlm.nih.gov/articles/PMC12903694/

6. Guidance for Industry: Action Levels for Poisonous or Deleterious Substances in Human Food and Animal Feed  https://www.fda.gov/regulatory-information/search-fda-guidance-documents/guidance-industry-action-levels-poisonous-or-deleterious-substances-human-food-and-animal-feed?utm_source=chatgpt.com

7.Chronic Aflatoxin Exposure and Cognitive and Language Development in Young Children of Bangladesh: A Longitudinal Study https://pmc.ncbi.nlm.nih.gov/articles/PMC9784379/

8. Aflatoxin exposure and cognitive performance in Mexican adolescents  https://pubmed.ncbi.nlm.nih.gov/42727913/