Mold & Your Immune System How Mold Exposure Can Alter Your Immune System Most people think mold only causes allergies or reacts via mycotoxins. But there’s a lesser-known mechanism that can explain why symptoms sometimes linger even after removing mold from your environment. 🧠 Mold Can “Flip a Switch” in Your Immune System Inside your body, there’s a sensor called the Aryl Hydrocarbon Receptor (AhR) . Think of it as a monitor  that detects environmental chemicals and tells y