Lena Marsh, MD, MPH, is a neurogastroenterologist who diagnoses and treats patients at a leading center for gastrointestinal motility disorders in New York City, New York. She founded the practice, which she dedicates to gut motility disorders and the kinds of "IBS" that never respond to diet.

"My name is Dr. Lena Marsh. I'm a board certified neurogastroenterologist and professor of medicine based in New York City.

I served as the director of a gastrointestinal motility center at a major academic medical center for several years, and I've spent my career studying the disorders that get waved off as 'just IBS.'

And I'm the founder and director of a practice devoted entirely to gut motility disorders here in New York City.

Many doctors consider me an authority on 'gut motility.'

If you've never heard that term, gut motility is just a fancy way of saying 'digestion speed' or 'how fast things move through you.'

In other words, gut motility measures how fast food makes its transit through the gut and becomes poop.

If gut motility is too slow, folks end up with dry, hard feces and constipation.

But if gut motility is too FAST — which is what I see constantly in people labeled with IBS-D — the gut never gets the chance to absorb water or nutrients properly, and one ends up with watery, urgent diarrhea, painful bloating, embarrassing gas, and the constant fear of not making it to a toilet in time."

These are things I see almost on a daily basis in my NYC office, and I know very well the problems that happen when you use these kinds of temporary solutions.

Sure, some of these could plug the problem momentarily...

But because the root cause isn't addressed, the symptoms come back within days, and each time through the cycle, the gut becomes more degraded — leaving people more bloated, more urgent, and more afraid to eat or leave the house.

Fiber has been the go-to "gut health" advice for as long as I can remember. More fiber, more fiber, more fiber.

The idea is that fiber regulates digestion, and for some people it offers a temporary impression that it's helping.

However, most people with these symptoms have one core problem: too much bacteria in the wrong place.

This creates gas and uncomfortable, painful bloating. If you've ever felt like "more fiber would murder me," you know exactly what I'm talking about.

For a gut already overgrown with fermenting bacteria, extra fiber is just extra fuel — it feeds the very thing making you sick.

And especially for someone trying to get an overactive gut back under control, piling on fiber is doing far more harm than good.

I'll show you a more natural way — one that targets the overgrowth at the source, calms the bloating, and helps stools come out solid and formed instead of loose and urgent.

Imodium and anti-diarrheals work by slowing your gut down so the urgency eases for a while.

So yes, they can get you through the day. But here's why you should never rely on them long term:

If your food isn't being properly digested in the small intestine in the first place, slowing things down doesn't remove the cause. Every Imodium tablet is a plaster over a wound that's still bleeding underneath.

You need a higher dose for the same effect. Some nights it doesn't work at all. You're trapped in a cycle that only tightens — taking 2 before bed every night just to survive the next day.

There's a simpler way to address what's actually causing the urgency, instead of masking it night after night

Okay, so fiber feeds the overgrowth and Imodium just masks it...

Now you might be asking — but what about rifaximin? Isn't that the actual prescription for SIBO?

It is. And for some people it helps for a few weeks.

So why do so many people end up right back where they started?

Don't get me wrong — sometimes a course of rifaximin has its place.

But here's the problem... rifaximin kills bacteria indiscriminately. The good along with the bad.

That's a big reason the relapse rate is so brutal. Many people are back to square one within months, having lost their good bacteria in the process. The avatar of this struggle is the person who's tried rifaximin twice — and watched it fail twice.

There's a more selective way to go after the overgrowth, without scorching everything else in your gut.

So before we talk about how this gas affects the gut, here's a quick lesson on how food and waste move through the digestive tract...

Food moves through the gut using a process called peristalsis. Peristalsis is the involuntary constriction and relaxation of the intestinal muscles, creating wave-like movements that push the contents along.

There are also the cleaning waves of the Migrating Motor Complex (MMC) — the "housekeeping" waves that sweep the small intestine clean between meals. These waves are supposed to keep the small intestine relatively free of bacteria.

When that housekeeping breaks down, bacteria that belong further down in your gut start to overgrow in the small intestine — where they were never meant to be.

And in hydrogen-dominant SIBO — by far the most common form in IBS-D — those bacteria do two specific things to your motility.

First, the excess hydrogen they produce literally accelerates your gut motility — food races through before it's properly digested. That's why there's no warning and no control.

Second, that same hydrogen pulls water into your intestines. That's why the stool is loose and watery instead of solid and formed.

In turn, the overgrowth ferments your food prematurely, producing gas high up in your digestive tract where it gets trapped. And besides smelling terrible, this gas makes the belly protrude and makes everyday living miserable.

Folks end up bloated by lunchtime, running to the toilet with no warning, frozen mid-conversation hoping a cramp passes — just feeling exhausted and unwell.

Right now, one might be thinking: where does this overgrowth come from in the first place? And that's a very good question...

You see, in many people it traces back to a single event — a bout of food poisoning or a stomach bug the gut never fully recovered from. So many sufferers say the exact same thing: "my stomach has never been the same since."

That illness can damage the very nerves and housekeeping waves that are supposed to keep the small intestine clean.

What's left is an infestation — a rogue colony of hydrogen-producing bacteria that have made themselves at home in the small intestine, a place that's meant to stay relatively clean.

The hydrogen these bacteria produce transforms the gut into an environment that suits their colonies.

These invaders speed transit and flood the gut with water — which keeps their human host running to the toilet, never absorbing properly, never getting solid relief.

They can affect the brain, drive cravings, and generally hijack the gut for their own purposes — at the expense of one's health.

Once bacteria overgrow the small intestine, it results in fermentation, inflammation, and a gut lining that can no longer do its job.

This overgrowth is rarely caught by standard testing. Colonoscopy — "normal." Endoscopy — "normal." CT scan — "normal." Ultrasound — "normal." Meanwhile it quietly drains your energy, your nutrients, and your health.

And those bacteria have their own waste products. Those byproducts go straight back into the bloodstream, making one feel sick, foggy, and depleted.

What if there was something folks could do at home, using safe and natural ingredients, to clear out the overgrowth that's throwing their gut into overdrive?

It could literally mean relief for hundreds of thousands of people who couldn't make it to my New York City practice.

So I began researching every natural ingredient I could find that could selectively clear the overgrowth without wiping out the good bacteria the way antibiotics do. There are tens of thousands of ingredients out there, and most have little to no research behind them.

It wasn't until I came back to one of nature's most powerful antimicrobials — used for centuries — that I found what I was looking for.

The breakthrough is the selectivity — the ability to go after the overgrown bacteria in the small intestine, without scorching the delicate good bacteria the way broad-spectrum antibiotics do.

And because it's liquid drops, not a capsule, it sidesteps the broken, inflamed small intestine that renders ordinary pills useless.

Imagine finally having a solid, formed bowel movement — no urgency, no cramping...

Pressing your fingers into your stomach and feeling it soft instead of hard, tight, and bloated...

And finally going out for dinner, ordering what you actually want, and sitting there afterward without once thinking about where the nearest toilet is.

Gone are the days of running to the bathroom, of not trusting your own body, of planning your whole life around the next emergency.

This isn't a harsh antibiotic that wipes out everything good along with the bad. And it isn't another drug that just slows your gut down and traps the problem.

Oil of oregano's active compound, carvacrol, is selective — it targets the overgrowth that doesn't belong while leaving your beneficial bacteria alone. It knows who's good, who's bad, and who's got to go.

Nutrition Therapy's Oil of Oregano is a research-backed approach that targets the overgrowth driving your bloating, gas, and urgency — while supporting the gut lining the overgrowth has damaged.

Now, say goodbye to freezing mid-meeting, to scanning every restaurant for the nearest toilet, to the daily bloating that makes you look six months pregnant. Oil of oregano has helped people finally settle their stomachs and reclaim their lives.

Oil of oregano has been valued for its antimicrobial properties across herbal medicine traditions for generations. And when you look at the modern research, it's easy to see why.

Its active compound, carvacrol, acts like an army of friendly soldiers that march straight to the small intestine and get to work on the overgrowth that may have hijacked your gut.

Not only does it go after the bacteria throwing your gut into overdrive — it does so selectively, sparing the beneficial bacteria your gut depends on.

Say goodbye to the embarrassing gas, the cramping that hits out of nowhere, and the bloating that's run your life...

And unlike rifaximin and broad-spectrum antibiotics — which carpet-bomb every bacterium you have and so often relapse...

Carvacrol targets the overgrowth without wiping out your friendly microbiome.

In fact, a study published in 2014 found that herbal antimicrobials — the class that includes oil of oregano — were at least as effective as rifaximin for clearing SIBO, with the herbal group showing a higher rate of clear follow-up breath tests, and without indiscriminately wiping out the gut.

The more you understand about carvacrol, the more it makes sense for the kind of gut that's been mislabeled as "just IBS."

But here's the part that matters most for someone with SIBO — remember, the damaged small intestine can't properly absorb tablets and capsules.

Which is exactly why Nutrition Therapy delivers it as liquid drops. No capsule to survive a broken gut. The oregano goes to work directly, right where you need it.

Working alongside the oregano, black seed oil has been used in traditional medicine for over 2,000 years — what some cultures call "the remedy for everything except death."

Its active compound, thymoquinone, has been studied for its soothing, supportive properties.

While the oregano targets the overgrowth, black seed oil helps soothe and calm the inflamed, irritated gut lining the overgrowth has been damaging.

That matters, because a gut that's been overrun and inflamed for years needs support to settle — not just something that masks the symptoms.

Think of the oregano as the part that clears, and black seed oil as part of what helps your gut recover.

SIBO's malabsorption doesn't just make pills useless — it quietly drains your nutrient levels over time. Those worsening deficiencies are part of what spirals the rest of your symptoms.

That's why this formula includes vitamin D, which plays a key role in immune function.

Replenishing what the overgrowth and the malabsorption have depleted helps your body actually recover — not just survive the next flare.

(The formula also includes a few supporting ingredients to round things out — but the heavy lifting comes from the oregano, black seed oil, and vitamin D above.)

Dr. Lena Marsh MD
Neurogastroenterologist & Gut Motility Specialist

Since word has spread about going after the real cause instead of masking it, folks everywhere have been ordering more Oil of Oregano every day.

You're going to love what it does for your gut.

Our customers keep telling us they can eat out again, travel again, and trust their own bodies again — and how good it feels to stop planning their lives around the nearest toilet.

Because of all this, there's a problem. Demand has been overwhelming, and a concentrated, high-quality oil of oregano isn't something we can produce overnight. When stock runs low, it can be weeks before a new batch is ready.

That's why, for our anniversary, we're running our best deal: buy 2 bottles of Oil of Oregano and get your 3rd completely free.

And there's a reason this matters for SIBO specifically. Clearing a stubborn overgrowth — and keeping it from creeping back — takes more than a couple of weeks of consistent use. The people who get the best results are the ones who give it real time. The buy 2, get 1 free bundle is the sensible way to do that without paying full price for every bottle.

I'd hate to see you settling your gut for a few weeks, then running out and having to start over because stock ran dry.

So if it makes sense for you, please consider grabbing the buy 2, get 1 free bundle while the anniversary sale is on. You're always covered by our 60-day money-back guarantee, so there's genuinely no risk at all.

Either way, whatever you choose today, my team and I are here to support you. Thank you from the bottom of my heart. Wishing you a happy, healthy gut for years to come.