Your Detox Genes, Explained: Mold, Metals, and Why It's Different for Everyone

"Detox" is a loaded word. It's been co-opted by juice cleanses and supplement marketing to the point where it's easy to dismiss. But your body's actual detoxification systems are real, essential, and genetically variable. How well you process environmental toxins like mold, heavy metals, and pollution depends in part on your DNA.

How detoxification actually works

Your body processes toxins in phases. Phase I enzymes (mainly the cytochrome P450 family) modify toxins to make them easier to eliminate. Phase II enzymes (like glutathione transferases) attach a molecule that makes the toxin water-soluble so it can be excreted. When these phases work in balance, toxins move through your system efficiently. When they don't, intermediate metabolites can accumulate.

Mold sensitivity

Some people live in water-damaged buildings and never notice a thing. Others develop significant symptoms. Genetics play a role in this variation. Genes involved in glutathione production, HLA immune response, and inflammatory signaling can influence how well your body recognizes and clears mold-related compounds (mycotoxins). If your clearance pathways are slower, exposure that seems minor to someone else can create a larger burden for you.

Heavy metal processing

Mercury, lead, arsenic, and cadmium are present in the environment at varying levels. Your body has natural mechanisms for clearing them, primarily through glutathione conjugation and metallothionein proteins. Genetic variants in the genes that code for these systems can make some people significantly better or worse at processing heavy metals.

This doesn't mean you should panic about exposure. It means your response to a given level of exposure is individual — and knowing where your genetic vulnerabilities are can help you make informed decisions about testing, avoidance strategies, and support.

What Mosaic covers

Your Mosaic report includes gauges for mold sensitivity, heavy metal clearance, pollution sensitivity, glutathione production, and more in the Toxin Sensitivities and Detoxification Pathways sections. These insights help you and your practitioner understand your body's capacity to handle environmental stressors — and where it might need extra support.