Mold Toxicity & Immune Health

Ochratoxin A: The Hidden Mold Toxin Destroying Your Immune System (And What To Do About It)

By Ashley Drummonds  ·  Board-Certified Integrative Health Practitioner & Integrative Hormone Specialist

What if the home you're living in, the building you work in, the gym you go to — or even the coffee you drink every morning — is the exact thing ruining your immune system?

It sounds dramatic. But it's something I see in my practice every week. And it's something I lived through personally.

There is a specific, highly toxic mold strain called Ochratoxin A that most conventional doctors never test for. Yet it could be the answer behind years of unresolved, misdiagnosed, and dismissed symptoms.

In this article, I'm going to break down exactly what Ochratoxin A is, where it hides, how it silently destroys your kidneys, brain, and immune system — and most importantly, what you can actually do about it.

What Is Ochratoxin A (OTA)?

Ochratoxin A, or OTA, is a mycotoxin — a toxic compound produced by mold fungi, specifically from the Aspergillus and Penicillium species. It is one of the most widely studied and dangerous mycotoxins known to affect human health.

OTA is classified as a possible human carcinogen and affects multiple organ systems simultaneously — which is exactly why it so often gets missed or misidentified in conventional medicine.

What makes Ochratoxin A different from other mold-related toxins is that it doesn't just come from water-damaged buildings. It also enters the body directly through food.

Hidden Food Sources of Ochratoxin A

If you've cleaned up your home environment but are still feeling sick, food contamination may be the missing piece. The most common dietary sources of Ochratoxin A include:

• Coffee — especially conventional, non-organic, pre-ground coffee. Choose whole bean, organic, mycotoxin-tested coffee.
• Oats — if you're not buying organic, gluten-free, and glyphosate-free oats, this is a significant source of OTA exposure.
• Red wine and beer
• Dried fruits
• Stored grains — they absorb moisture easily, creating the perfect environment for mold growth
• Dairy products
• Nuts and peanut butters

Why Conventional Doctors Miss Ochratoxin A

This is one of the most frustrating parts of this illness — and one I hear constantly from my clients.

Standard blood work from your doctor will not check for Ochratoxin A or mycotoxins at all. When someone presents with the constellation of symptoms caused by OTA, doctors are trained to treat the individual symptoms rather than investigate what is driving them.

So a patient might leave with prescriptions for anti-inflammatories, steroids, diuretics, or blood sugar medication — while the underlying mycotoxin load continues unchecked.

Ochratoxin A can trigger symptoms across neurological, autoimmune, psychiatric, hormonal, and gut health systems simultaneously — which means patients often end up bouncing between specialists, none of whom ever connect the dots.

Where Ochratoxin A Hides: Your Home, Car, and Workplace

Water-damaged buildings are the number one environmental source of Ochratoxin A exposure. Here's what to look for in the spaces where you spend the most time:

In Your Home

• Roof leaks — even old or previously repaired ones
• Bubbling or peeling paint around window seals
• HVAC systems and central air units with any moisture or condensation
• Under sinks, behind dishwashers, and around washing machines — especially front-load washers

In Other Environments

• Your car (especially if it's ever had water intrusion)
• Your gym
• Your office building

Ochratoxin A Symptoms: The Full Checklist

One of the reasons OTA is so consistently missed is that its symptoms span multiple body systems and are frequently dismissed as anxiety, chronic stress, or lifestyle issues. If you have symptoms across multiple categories below at the same time, that is a significant red flag.

Why Some People React Severely — And Others Don't

I get this question constantly: "We all live in the same house. Why am I the only one sick?"

The answer is multifactorial:

• The HLA gene — a genetic variant that makes certain people significantly less efficient at detoxing mold from the body
• Pre-existing immune compromise — if your immune system is already stressed, mold amplifies everything
• Total toxic burden — what else is your detox system already managing?
• Unique biochemistry — we all process environmental toxins differently

How Ochratoxin A Destroys the Immune System

Here's the mechanism that explains why OTA creates such far-reaching, systemic illness:

Ochratoxin A alters cytokine signaling — the chemical messengers that coordinate your immune response. This puts your body in a constant state of inflammation. Chronic, low-grade inflammation is the root driver behind most ongoing chronic illness.

Simultaneously, OTA locks your limbic system and nervous system into a sustained fight-or-flight survival state. When you are perpetually in survival mode, your body never drops into the parasympathetic rest-and-repair state it needs to heal. Everything — hormone regulation, gut function, detox pathways — suffers as a result.

Making matters worse: Ochratoxin A binds to albumin, which means it does not simply leave the body when you exit a moldy environment. Instead, it recirculates through your bile acids, getting flushed by the liver and then reabsorbed — over and over — without active intervention.

How to Test for Ochratoxin A

Urine mycotoxin testing is the gold standard for identifying Ochratoxin A. I use and recommend a specific urine myco test with my clients — you can find the link in my testing resources here.

A few critical notes on testing:

• Standard blood work will not detect this. Do not rely on a general panel from your doctor.
• False negatives are possible if your body is highly backed up and struggling to excrete toxins. Clinical presentation matters as much as test results.
• A glutathione push (taken 30 minutes before testing) can help mobilize toxins and improve test accuracy.
• Environmental testing — ERMI and HERTSMI air and dust sample tests (available online) can identify where in your environment exposure is occurring: your home, car, gym, or office.

The 3-Pillar Framework for Detoxing Ochratoxin A Safely

Detoxing from mold is not one-size-fits-all. Here is the framework I use with every client in my practice:

I know how isolating, exhausting, and defeating it feels to be dismissed by doctor after doctor while your body continues to deteriorate. I lived it.

I also know — because I healed from it, and have watched hundreds of clients do the same — that full recovery from mold toxicity is absolutely possible. Your energy, your clarity, your health, and your life are not gone. They are waiting on the other side of the right protocol.

Ashley Drummonds is a Board-Certified Integrative Health Practitioner (AADP), Integrative Hormone Specialist, and mold toxicity recovery specialist. She has been featured in Forbes, Oxygen Magazine, Strong Fitness Magazine, and ABC Action News, and is the author of The Mold Detox Blueprint. Learn more at ashleydrummonds.com.