Acetylation
This pathway handles histamine, caffeine, and a long list of chemicals and medications. Slow acetylators often experience fragrance sensitivity, medication side effects, or react to things that most people tolerate. Once you know, you can support the bottleneck instead of wondering why everything bothers you.
What this measures
How your DNA shapes acetylation.
NAT2 codes for N-acetyltransferase 2 — the liver enzyme that attaches acetyl groups to drugs, toxins, and dietary compounds for clearance. The variants produce one of the most dramatic phenotypic splits in pharmacogenomics: "slow acetylators" and "fast acetylators" handle the same compounds at very different speeds.
Roughly 50–60% of people of European descent are slow acetylators (carriers of two reduced-activity NAT2 alleles). Carriers of the slow phenotype are associated with longer drug exposure, increased side effects from medications like isoniazid (TB drug), hydralazine, and sulfa antibiotics — and slower clearance of dietary aromatic amines from grilled meats and tobacco smoke. Fast acetylators clear these compounds rapidly.
Cigarette smoke, well-done grilled or charred meat, and certain occupational exposures all run through NAT2-dependent clearance. Antioxidant-rich foods support the broader detox network around acetylation. Alpha-lipoic acid and NAC offer indirect support. Pacing drug doses and timing meals can both reduce the slow-acetylator burden.
A "this medication hits me harder than it should" or "smoke really bothers me" pattern often hides a slow-acetylator NAT2 genotype. Which version you carry decides how you read drug response, why certain dietary or environmental exposures land harder, and which clearance support is worth maintaining.
Acetylation is one specific finding in this system. Your Genomic Lifestyle Optimization Report shows where your variants place you on the detoxification pathways spectrum — and what you can do about it.
In your report
Where Acetylation lives inside your Genomic Lifestyle Optimization Report.
Acetylation renders as a dark-background card with a color marker calibrated to your specific variants. The card opens with the gene mechanism, shows your result at a glance via that marker, and closes with a practical, mechanism-led recommendation — what to eat, what to time, what cofactors to support.
Want to see what a real Mosaic dark card looks like? Walk through a sample report →
In context
Phase II Pathways: the 4-insight cluster.
Acetylation is one finding in a tightly-related cluster. Mosaic sequences the other 3 alongside it so you see the whole biology — not an isolated data point.
- Glutathione Support NeedsGlutathione is your body's master antioxidant—the one that recycles all the others. Some people produce plenty; others run chronically low without knowing it. Lower genetic output is common and responds well to precursors like NAC, glycine, and selenium. This is often the missing piece for people who "do everything right" but still feel run down.
- MTHFR ActivityMTHFR converts synthetic folic acid into the active methylfolate your body uses. Reduced function is common, affecting up to 40% of people. If you're one of them, standard prenatal vitamins and fortified foods won't cut it. Methylfolate supplementation bypasses the bottleneck entirely.
- MethylationMethylation is the behind-the-scenes regulator of detox, neurotransmitter production, and gene expression. Suboptimal activity is surprisingly common—and highly responsive to the right form of B-vitamins. If you've ever taken B-complex and felt nothing (or worse), this is probably why.
Questions people ask
About Acetylation.
- How does my DNA influence acetylation?
- Phase I (CYP450 enzymes), Phase II (sulfation, glucuronidation, methylation), and Phase III (transport) — the three-act process by which your body neutralizes everything from caffeine to alcohol to environmental compounds. Genetic variants in any phase shift the kinetics, and the bottleneck moves accordingly.
- What kind of test do I need to see my Acetylation result?
- Whole-genome sequencing at 30× clinical depth. Consumer SNP-chip tests like 23andMe or AncestryDNA only read ~0.02% of your DNA and miss most of the variants this analysis needs. Mosaic reads all 3 billion base pairs and produces the full 108-insight report.
- How is Acetylation different from clinical lab testing?
- Clinical labs measure downstream biomarkers — blood levels, hormone values, metabolic byproducts — at a single point in time. Genomic insights like Acetylation reveal the underlying variant that shapes the biology, which is constant for life. The two are complementary: labs show the current snapshot; genomics shows the long-term tendency and where lifestyle leverage is highest.
More from Detoxification Pathways
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Anesthetics Metabolism
Some people wake up from anesthesia quickly and clearly; others are groggy for hours or experience prolonged side effects. Your clearance rate predicts which camp you're in—valuable information before any procedure requiring sedation.
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Glutathione Support Needs
Glutathione is your body's master antioxidant—the one that recycles all the others. Some people produce plenty; others run chronically low without knowing it. Lower genetic output is common and responds well to precursors like NAC, glycine, and selenium. This is often the missing piece for people who "do everything right" but still feel run down.
Read insight →detoxification pathways
MTHFR Activity
MTHFR converts synthetic folic acid into the active methylfolate your body uses. Reduced function is common, affecting up to 40% of people. If you're one of them, standard prenatal vitamins and fortified foods won't cut it. Methylfolate supplementation bypasses the bottleneck entirely.
Read insight →detoxification pathways
Medication Metabolism
The enzyme family that processes roughly half of all prescription drugs. Your version determines whether standard doses work perfectly, cause side effects, or barely register. This prevents the trial-and-error prescribing that leaves people cycling through medications, wondering why nothing works right.
Read insight →detoxification pathways
Methylation
Methylation is the behind-the-scenes regulator of detox, neurotransmitter production, and gene expression. Suboptimal activity is surprisingly common—and highly responsive to the right form of B-vitamins. If you've ever taken B-complex and felt nothing (or worse), this is probably why.
Read insight →
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