InstalabMycotoxins
Should you take a Mycotoxins test?
This test is most useful if any of these apply to you.
11 biomarkers included
- Aflatoxin M1A breakdown product of aflatoxin, the food toxin with the clearest human cancer link; it forms after eating contaminated grains, nuts, or dairy.Detection points toward dietary aflatoxin exposure, which carries the strongest human evidence linking a mycotoxin to liver cancer.
- Chaetoglobosin AA toxin made by Chaetomium molds found on damp indoor materials, included to broaden coverage of building-associated fungi.This toxin is found on damp indoor materials, but urine detection is unvalidated and human health data are very limited.
- DihydrocitrinoneA kidney-affecting toxin from many molds found widely in cereals; its urinary marker is one of the more reliable exposure signals in this panel.Because citrinin appears in nearly everyone tested, a positive result usually reflects common dietary exposure rather than an unusual finding.
- Enniatin BAn emerging Fusarium grain toxin that broader panels can capture, adding to the picture of dietary fungal exposure.A positive result reflects dietary exposure to a less routinely monitored toxin with limited human health-outcome data.
- GliotoxinA toxin from the mold Aspergillus fumigatus; best studied in serious lung infections, not as an environmental urine marker.Detection is not a validated marker of indoor mold; most gliotoxin research involves invasive infections, not environmental screening.
- Mycophenolic AcidA Penicillium toxin found on damp building materials; it is also the active ingredient in a common immunosuppressant medication.A positive result may reflect Penicillium exposure, but immunosuppressant medication can also raise it; it does not measure immune effects.
- Ochratoxin AA toxin from Penicillium and Aspergillus molds, common in both grains and damp buildings, and one of the most frequently detected urinary markers.A positive result signals recent exposure but cannot by itself separate food from indoor mold or prove any disease.
- Roridin EA Stachybotrys mold toxin tied to water-damaged, paper-rich building materials rather than to food.This toxin appears in water-damaged buildings, but its detection in urine is not a validated marker of indoor exposure.
- SterigmatocystinA toxin from Aspergillus molds that is a chemical precursor of aflatoxin, found in food and sometimes damp buildings, and still early in human study.Detection indicates exposure to an aflatoxin-related toxin, but urine-based interpretation for this marker is not yet well validated.
- Verrucarin AAnother Stachybotrys mold toxin associated with water-damaged buildings; alongside roridin E it points toward indoor rather than dietary sources.This Stachybotrys toxin is found in damp buildings, but urine detection is unvalidated for indoor exposure and cannot establish illness.
- ZearalenoneA Fusarium grain toxin that acts like estrogen; its urinary markers are used widely and point mostly toward food exposure.Elevated levels suggest recent grain-related exposure to a hormone-like toxin, though everyday interpretation frameworks are still developing.
About Mycotoxins
Molds leave chemical traces. When you eat grain, coffee, nuts, or dried fruit, or spend time in a damp building, small amounts of fungal toxins can enter your body and leave through your urine.
This panel measures eleven of those toxins in a single urine sample. It is used mainly in research and functional medicine settings to estimate recent fungal toxin exposure. It is not a diagnosis of any illness, because standardized clinical thresholds for these markers do not yet exist.
What This Panel Reveals
Fungal toxins, called mycotoxins, are poisons made by molds. Humans are rarely exposed to just one. Real-world studies almost always find several at once, which is the core reason this test looks at eleven markers together rather than one. In one southern Italy study, every one of the 52 volunteers had at least two different mycotoxins in their urine.
Most of these markers describe exposure through food. Aflatoxin, measured here as aflatoxin M1 (a breakdown product the body forms after eating contaminated grains, nuts, or dairy), is the food toxin with the clearest human cancer link. Ochratoxin A, citrinin, zearalenone, and enniatin B are typical of molds that grow on cereals and other stored crops. Together these paint a picture of what has passed through your diet recently.
A second group of markers is produced by molds that grow in damp indoor spaces. Gliotoxin comes from a common indoor Aspergillus mold, while roridin E and verrucarin A come from Stachybotrys, the mold that grows on water-damaged, paper-rich building materials, and chaetoglobosin A comes from another damp-loving indoor fungus. People hope these will confirm a mold problem at home or work, but that link is not established. These toxins have been measured in building dust and materials, not validated as urine markers of indoor exposure. Medical toxicology groups, including the American College of Medical Toxicology, caution that diet is the dominant source of human mycotoxin exposure and that finding these toxins in urine cannot be attributed to breathing them indoors.
The catch is that some markers sit in both worlds. Ochratoxin A and citrinin can come from either food or indoor mold, so on their own they cannot tell you which source you are dealing with. The value of the panel is in the overall pattern, not any single number.
How to Read Your Results Together
Because this panel is exploratory, read it as an exposure signature rather than a score. A few broad patterns are worth recognizing in your own results.
| Pattern | What It May Suggest |
|---|---|
| Mainly aflatoxin M1, zearalenone, enniatin B present | Points toward diet as the likely source, since these are classic food-crop toxins. |
| Gliotoxin, roridin E, or verrucarin A present | These toxins come from indoor molds, but their detection in urine is not a validated marker of indoor exposure, and dietary sources cannot be ruled out. |
| Only ochratoxin A or citrinin detected | Not source-specific. These appear commonly from ordinary food and cannot alone confirm indoor mold. |
| Several markers across both groups | A mixed exposure signal, which is the most common real-world finding rather than a red flag. |
Detection also does not equal disease. Sensitive lab methods find low levels of these toxins in the urine of healthy people, and a study of German children and adults detected a citrinin marker in essentially every sample. A positive result tells you exposure happened, not that it is harming you.
When Results Can Be Misleading
Several factors move most of these markers at the same time, which is why a single panel is a snapshot rather than a verdict. Urine reflects recent intake, so what you ate in the days before the test shapes the result. Hydration matters too, which is why labs adjust values for urine concentration.
Levels also swing widely from day to day. In a European validation study that sampled the same people on two separate occasions, urinary mycotoxin measurements agreed poorly between the two collections, so the same toxins often were not detected both times. A one-time result can miss exposure that was there last week, or catch a toxin that was only passing through.
What to Do with Your Results
Treat this panel as a starting point for a conversation, not an answer. Major guideline bodies do not endorse urine mycotoxin panels to diagnose mold-related illness, and there is no U.S. Food and Drug Administration (FDA) approved version of this test. The American College of Medical Toxicology specifically states that finding these toxins in urine cannot be attributed to indoor mold inhalation, so results carry less weight than an established clinical panel.
If food-type markers dominate, the practical response is dietary: examine grains, coffee, nuts, and dried fruit, and how they are stored. If markers linked to indoor molds show up, remember that urine cannot confirm an indoor source; still, inspecting your home or workplace for moisture and mold is a reasonable step, since fixing any source matters more than the number. Because two toxins in this panel are linked in human research to the liver (aflatoxin) and the kidneys (ochratoxin A), companion blood tests of liver and kidney function can add helpful context.
Serial testing has not been validated as a clinically useful strategy for this panel. Because levels bounce around from day to day, no single draw is definitive, but repeating the test cannot reliably pin exposure to a source either. Interpret meaningful results with a licensed clinician or toxicology specialist who can weigh your symptoms, exposure history, and other explanations.