A new federally funded study is asking a question a lot of people in humid climates have wondered about: can mold exposure play a role in chronic fatigue? Here's what the research is actually looking at, and, just as important, what it hasn't shown yet.
Can mold exposure cause chronic fatigue?
The straight answer is that researchers don't know yet. There's no proven cause-and-effect link between mold and chronic fatigue syndrome, but a major new study is now investigating whether one exists.
Some people living with chronic fatigue syndrome have reported that their symptoms started after time spent in mold-contaminated spaces. That observation is part of what prompted the research. It's worth remembering that two things happening together isn't the same as one causing the other, and closing that gap is exactly what the study is designed to do.
What the new NIH-funded study is investigating
Researchers at Nova Southeastern University have received a $3 million grant from the National Institutes of Health to study whether byproducts from certain molds affect people with ME/CFS.
The funding comes from the NIH's National Institute of Neurological Disorders and Stroke and runs through 2031. The team plans to collect biological samples from more than 200 participants and measure their exposure to mycotoxins, which are compounds produced by some molds, to see whether specific exposures line up with immune-system changes tied to the illness.
What is chronic fatigue syndrome?
Chronic fatigue syndrome, known medically as ME/CFS, is a serious long-term illness that causes extreme fatigue that rest doesn't relieve, along with brain fog, sleep problems, and a worsening of symptoms after physical or mental activity.
According to the CDC, between 836,000 and 3.3 million Americans are living with ME/CFS, and the vast majority remain undiagnosed. Part of the reason is that there's no single test that confirms it, which makes research into possible triggers like this one especially valuable.
Why this question comes up so often on the Gulf Coast
Along the Gulf Coast, high humidity, heavy rain, and flooding create exactly the damp conditions mold needs, so questions about mold and health tend to come up here more than most places.
Houston-area homes deal with year-round humidity, HVAC systems that run hard for most of the year, and slab foundations that can hold moisture. None of that means mold is making anyone sick. It does mean indoor moisture is worth taking seriously here, whatever future research concludes.
What you can actually do about mold and moisture
Whatever the research eventually shows, the practical step is the same one experts already recommend: control the moisture. The EPA puts it plainly. The key to controlling mold is controlling moisture, and if you clean up mold without fixing the water source, it usually comes right back.
Here's what that looks like in practice:
- Fix leaks and drainage problems quickly, and dry any wet materials within about 24 to 48 hours.
- Keep indoor humidity down with good ventilation, exhaust fans, and a dehumidifier where you need one.
- For a small patch (the EPA uses roughly 10 square feet as a rough guide), many homeowners can handle the cleanup themselves.
- For larger areas, water that may be contaminated, or mold in your HVAC, it's worth bringing in a professional.
Fixing the water source is the foundation. Once that's handled, our patented VaPURE dry fog process can help address what mold left behind, so the space is clean and your indoor air is healthier again.
Frequently asked questions
Does mold cause chronic fatigue syndrome?
There's no proven link yet. Some people with ME/CFS report symptoms starting after mold exposure, and a new NIH-funded study is investigating whether mold byproducts play a role, but a cause-and-effect connection hasn't been established.
What are mycotoxins?
Mycotoxins are compounds produced by certain kinds of mold. Not every mold produces them, and their effects on people are still being researched. The new study is looking at whether exposure to them is connected to immune changes in people with ME/CFS.
How do I know if I have a mold problem in my home?
Common signs are a musty smell, visible growth, and a history of water damage or high humidity. If you want a formal evaluation, a licensed mold assessor can test and confirm what's going on.
Should I test my home for mold first?
If you can already see or smell mold, the EPA notes that testing usually isn't necessary before cleaning it up, since the response is the same either way. If you do want testing done, use a licensed assessor.
Noticing a musty smell or dealing with past water damage? We'll take a look and give you a straight answer about whether you need us.
