Mold Illness and Mycotoxins: What a Damp Home Can Do and What a Urine Test Can Tell You

Sophia Viner says yes, for some people. She points out that the WHO describes the evidence that mycotoxins play a role in indoor health problems as weak, and that the CDC says mycotoxin levels that predict disease have not been established. She has still seen patients in her practice become genuinely sick after exposure to a water-damaged building, with fatigue, brain fog and sinus problems. Her explanation is that it depends on the person: someone with a healthy immune system and good liver detoxification can clear mycotoxins, while someone whose immune system or detox capacity is weaker may not.

No. Sophia separates three different things. A mold allergy is one. A fungal infection, for example in the lungs, is another, and it can be found with a culture or imaging. What people call mold illness is different from both: it is not an allergy and not an infection a culture would show, but symptoms that appear when someone does not have a healthy terrain, meaning their detox system or immune system is not working at full strength.

Sophia starts with the timeline. When did the symptoms begin, what were they at the start, do they improve when you go away or persist all year, and is anyone else at home or at work sick too. Then come basic labs: a complete blood count, a complete metabolic panel, a liver panel and thyroid testing. The goal, she says, is to rule out the other causes that produce the same symptoms, because fatigue, brain fog and low energy can also come from a thyroid problem, low B12, low vitamin D or a hormone issue.

Sophia says the WHO and CDC do not consider urine testing useful for measuring the amount of mycotoxins, and that you cannot call someone sick from the level alone. She still finds the test useful when trying to work out whether someone has mold toxicity, as long as the results are read together with the person's symptoms. Some foods, including coffee, peanut butter and certain chips, can contain mold and show up as a positive, so patients stop those for a couple of days before the test. You do not have to give up coffee for good. She added that a mycotoxin blood test complements the urine test, and that the two work together.

If there has been a leak, Sophia says the building should be tested by an independent company and the mold removed, because someone still living in the environment producing it will not get better however much other support they receive. If the house tests positive and nobody has symptoms, she does not think selling is necessary. Fix the leak, get rid of the mold and make sure it does not grow back. She described having mold found around the ventilation system in her own home during an annual inspection and dealing with it rather than moving.

Sophia advises against buying aggressive binders or detox kits off the internet. Mycotoxins are lipophilic, meaning they attach to fat, which makes them hard to remove, and detox is not as simple as taking charcoal. Someone who is constipated and not having a bowel movement every day can be harmed by starting a detox, so bowel function has to be addressed first. She also asks what is actually inside those binders. Her view is that any detox has to be highly individualized to the person's health.