This is how microbiologist Zack Abbott uses biotech to think about hangovers and gut health

Most people assume hangovers are just dehydration. Drink water, take an ibuprofen, maybe eat something greasy, and you’ll be just fine. But according to microbiologist Zack Abbott, co-founder of ZBiotics, that misses the real culprit: acetaldehyde, a highly toxic molecule your body produces when it breaks down alcohol.

Abbott has spent years studying how acetaldehyde works and how to clear it out faster. His solution: genetically engineered probiotics designed to break it down before it wreaks havoc.

What acetaldehyde actually does to your body

Acetaldehyde is a small compound, but its chemical structure makes it destructive. The molecule binds to proteins, lipids, and DNA, disrupting normal cellular function. “It’s a bit like tossing a wrench into a finely tuned machine,” Abbott says.

One immediate impact: acetaldehyde spikes stress hormones like epinephrine and norepinephrine, triggering fight-or-flight responses. That’s the racing heart, restlessness, and anxiety. But as your body tries to correct the surge, you crash into sluggishness and low motivation. “It’s a pendulum swing,” Abbott says.

It also promotes histamine and bradykinin release, which dilate blood vessels — the flush, warmth, and skin changes people notice while drinking or the morning after. These are literal biochemical responses to a molecule your body is struggling to process.

Why your gut is ground zero

Most people assume the liver is where alcohol gets processed, and it is — mostly. But Abbott’s research shows the gut is actually the major source of acetaldehyde in the body. “A small amount of alcohol is processed in the gut, largely by the microbiome,” he explains. “And while your liver can fully detoxify alcohol efficiently, the gut largely converts it to acetaldehyde.”

The numbers are striking: colonic acetaldehyde levels can reach 10 to 100 times higher than what’s in your bloodstream immediately after drinking. But that acetaldehyde doesn’t stay put. It’s highly soluble, which means it gets absorbed into the body and circulates through your system. “A lot of the way you feel the next day does originate in the gut,” Abbott says.

That gut-liver dynamic is key. The liver handles the bulk of alcohol metabolism cleanly, but the gut creates a localized acetaldehyde surge that leaks into the rest of your body. It’s why targeting the gut (rather than just supporting liver function) can make a measurable difference in how you recover.

The difference between hoping and designing

Traditional probiotics are designed as generalists. They’re meant to support gut health in broad, often unspecified ways. Engineered probiotics work differently. “With an engineered probiotic, the ‘probiotic’ part is really just a chassis or delivery mechanism for the real value,” Abbott says. “It’s designed to perform a specific function and create a clearly definable benefit.”

The difference, he explains, is intention. Traditional strains are limited to whatever functions they naturally evolved. Engineered probiotics are purpose-built. “We can design them to perform a specific, beneficial task, like breaking down acetaldehyde, and do it consistently,” Abbott says. “It’s the difference between hoping a strain might do some unspecified helpful function and giving it the exact biological tools to do the job every time.”

Reframing genetic engineering

ZBiotics was the first company to bring genetically engineered probiotics to everyday consumers. Abbott made a deliberate choice: put “proudly GMO” on every bottle.

“We’ve been intentional about transparency from the beginning,” he says. The company explains how and why they use genetic engineering, demonstrating how it creates a direct benefit. “We believe that if people are given full, honest information, they can make informed decisions.”

The goal is to shift the conversation. By building products with clear functions and openly sharing the science, ZBiotics is turning fear into curiosity. “People start asking what this technology can do for them instead of worrying about the label,” Abbott says.

What this opens up

For Abbott, the work isn’t just about making your morning easier. It’s about demonstrating what’s possible when biotech is applied to everyday problems with precision.

Acetaldehyde is one molecule. The gut is one system. But the approach—engineering solutions for specific, measurable outcomes—opens the door to rethinking how we support the body in ways that feel both targeted and practical.