Hey there … don’t know what leaky gut is? I wrote about it last September. So if you’re not really sure what it is, either check out the article now or after reading this. But I’ll do you a favor by summarizing real quick. 

Ok, so leaky gut is when the protective barrier of your intestines gets weak and lets undigested food, viruses and other pathogens leak into your bloodstream. This causes an overreaction of the immune system, causing the body to attack its own tissues. This is why pretty much anybody with an autoimmune condition has leaky gut. 

And you can’t get in front of your symptoms if you don’t repair that gut lining. And it’s a big area to cover. In fact, if you count all the nooks and crannies in the gut barrier, it’s bigger than the average size house in America. I ain’t making that up. 

Now, I admit something: I never learned about leaky gut in nursing school. It wasn’t until I became a functional medicine practitioner that I became of leaky gut. But after working with dozens of clients and helping them overcome their digestion issues, I’ve come up with my 3 favorite supplements that can fix a leaky gut like a plumber coming to patch up a leak in your house. 

Want to know what they are? 

Marshmallow Root

When I first heard of this herb, I couldn’t not think about marshmallows. I was like, “great, that’s all I need is to be tempted by marshmallows.” Fun fact: marshmallows used to be made with marshmallow root. You can still make them the traditional way but now they’re made with complete junk: added sugars and corn syrup. 

So marshmallows used to be made with marshmallow root up until the early 20th century. Anyways, the reason why marshmallow root helps repair the intestinal barrier can be summed up in one yucky word: mucus. 

You see, your intestinal barrier is microscopic thin. And all that there is to protect is a thin layer of mucus. But when you consume marshmallow root, it helps soothe irritated gut cells and it also helps rebuild that mucus layer. So it’s not just the cells of the intestinal tract that can become weak because of leaky gut. It’s also the mucosal barrier. If you want to conquer leaky gut, you’ve got to build that mucus back up!


Next up on my list of best leaky gut supplements is L-Glutamine, which is just glutamine in supplement form. Up until just recently only bodybuilders took it to support muscle tissue regrowth after killer workouts. Glutamine is an amino acid, which are the building blocks of protein—the protein you eat and the protein tissues of your body. 

Glutamine is one of 20 essential amino acids. And it’s the most abundant amino acid in the human body. Your intestinal lining uses up a whole bunch of L-glutamine. This is what researchers recently discovered and why more people are taking it specifically for leaky gut. 

It’s estimated that approximately one-third of all your body’s glutamine is contained within the intestinal wall. Stress, poor diet, medications and OTC pain pills and other factors of leaky gut exhaust your body’s supply of L-glutamine. 

That’s why I recommend L-glutamine powder for my clients. 


The third supplement I recommend is collagen powder. Don’t confuse collagen powder with collagen lip implants. Totally different. We’re trying to fix leaky gut, not thin puckers. 

Anyway, collagen is not an amino acid. But it is a protein. Out of the thousands of proteins in the human body, collagen is the most abundant. Like L-glutamine, collagen is great for building back up the structural integrity of the mucosal barrier, albeit in a different way. Remember that super thin intestinal lining I talked about earlier?

Well, it’s made up of only one single layer of cells. That’s thinner than the width of a human hair. And in between those cells are junctions. You can think of these junctions as wooden boards in a fence. A well-built fence has very minimal space in between the boards. The same is true with the human gut. A strong gut has very tight junctions. Nothing that doesn’t belong in the blood will get into the blood. 

Collagen is really effective at tightening up those junctions in between the cells. 

Extra Leaky Gut Supplement

Now, if I had to pick another supplement I’d have to go with a probiotic. But not all probiotics will help. In fact, some of them are a waste of money. Come to think of it, I should write my next article about what to look for in a high-quailty probiotic. But here’s a couple things to look for. It should have a minimum of 50 billion-Colony Forming Units and contain several different strains. Ideally, you want a soil-based probiotic. 

Probiotics are essential for leaky gut because having enough friendly bacteria will improve the gut barrier defense.

Well there you have it … my favorite leaky gut supplements. Don’t forget that if you’re overwhelmed by your symptoms, I’m here to help. 

Schedule a free 30-minute discovery call with me now to get started.

Until next time, 

Jenna Witt, NP