Quick Answer
To improve gut health naturally, start by finding out what's actually going on rather than guessing, then rebuild the gut terrain over about three months: cut back on sugar and refined carbs, eat a wide variety of plants and some fermented foods, digest well (stomach acid, enzymes, eating calmly), keep bowel movements regular, support the gut lining, manage stress and sleep, and address any overgrowths with a practitioner. Gut issues are rarely caused by one thing, so the best results come from working on several of these at once.
A Nutritionist's Take
"Gut issues are rarely one thing. When someone runs a full workup, I usually see several imbalances at once, all growing out of the same poor terrain. That's why I focus on rebuilding the terrain, not chasing a single diagnosis."
— Jordan Dorn, Certified Nutritionist
Gut health has become one of the biggest topics in wellness, and for good reason. Your gut digests and absorbs your food, houses most of your immune activity, makes and regulates chemicals that affect your mood, and is home to trillions of microbes that shape how you feel every day.
It's also one of the most confusing topics out there. People see a video, decide "I have SIBO" or "a white tongue means candida," and start a protocol. In my experience, when someone actually gets tested, it's rarely just one thing. More often it's a mix: some pathogenic overgrowth, some fungal overgrowth, too much bad bacteria and not enough good, all driven by an unhealthy gut terrain.
This guide is the hub for everything we've written on gut health. I'll cover the signs of an unhealthy gut, what damages it, how I approach rebuilding it, and how long it takes, with links to deeper guides on each topic.
In this article 7 sections
Signs of an Unhealthy Gut
Poor gut health doesn't always show up as stomach trouble. Common signs include:
Bloating, gas or heaviness after meals. See why you might always be bloated.
Constipation, diarrhea or irregular bowel movements. See natural remedies for constipation.
Heartburn or reflux. It can come from too much stomach acid or, surprisingly, too little. See low stomach acid symptoms.
New food sensitivities. See how to do an elimination diet.
Skin flares like eczema or acne. See the gut-skin connection.
Brain fog, low mood, anxiety or fatigue. See the gut-brain connection.
None of these is specific on its own. Bloating alone can't tell you the cause, which is why testing matters.
What Damages Gut Health?
Stress and eating on the go
Stress is one of the most direct drivers of poor gut health I know of. You can't digest well in fight-or-flight mode, and stress can even make the gut lining temporarily leakier [4]. People on the go eat fast, take a handful of vitamins and assume they're absorbing everything. Digestion takes time, hours for some foods, and it needs your attention.
Sugar and refined carbs
Constant high-glycemic foods, high-fructose corn syrup and sugar-loaded smoothies feed the microbes you don't want more of.
Antibiotics
Antibiotics are sometimes necessary, but they hit good bacteria along with bad. In a study of healthy adults given a short course of antibiotics, the gut microbiome mostly recovered within about six weeks, but several common species were still missing in most people six months later [1]. See our guide on restoring gut health after antibiotics.
Food poisoning and travel
Here's something people miss. After food poisoning, they assume they're fine once the symptoms clear. But the microbiome was disrupted, and a pathogenic overgrowth can linger, so something they eat weeks later suddenly sets them off. The same goes for bad water or food while traveling.
Overgrowths, parasites and low stomach acid
Bacterial overgrowth (SIBO), candida, parasites and H. pylori can all disrupt the gut, and they often show up together. Low stomach acid makes overgrowth more likely, since acid is part of your first line of defense.
How to Improve Gut Health Naturally
I think about gut health through a framework called D.R.E.S.S.: diet, rest, exercise, stress management and supplementation. You don't take something for a condition. You build a healthier environment, and over time, especially with stress managed, the body tends to adapt. Here's how that plays out for the gut.
1. Test, don't guess
If you have ongoing symptoms, work with a practitioner. A GI-MAP stool test is one of the most useful starting points, especially after travel or a bad food or water exposure, because it can show pathogens, parasites, yeast, H. pylori and the balance of good and bad bacteria in one picture. Depending on symptoms, I also like tests for liver congestion, oxidative stress, gut lining integrity, histamine vs. DAO enzyme, and food sensitivities.
2. Shift your diet toward the gut you want
Over about three months, move away from sugary, refined foods toward a more bitter, ancestral way of eating:
Cut back on added sugar, refined carbs and very high-glycemic fruit. Favor lower-glycemic fruit and sweet potatoes over very starchy carbs.
Make half your plate vegetables at lunch and dinner. My wife and I do this every day, and we grow a lot of our own.
Eat a wide variety of plants. In a large citizen-science study, people who ate 30 or more different plant foods a week had more diverse gut microbiomes than people who ate 10 or fewer [2].
Add fermented foods. In a Stanford trial, a diet high in fermented foods like yogurt, kefir, sauerkraut and kimchi steadily increased gut microbiome diversity over 10 weeks and lowered 19 inflammatory markers in the blood [3]. Lactobacillus-rich foods are a great place to start.
Add bitter foods. Dandelion greens, arugula and bitter herbal teas support bile flow. As people cut sweets, their palate usually shifts toward bitter foods anyway.
Interestingly, the same Stanford trial found a high-fiber diet alone didn't increase diversity over 10 weeks. Fiber still matters, but it works best when the gut terrain is ready for it, which is why the next steps matter.
3. Digest your food well
Stomach acid is the first thing I look at for digestive complaints. Bitters after meals the Italian way, enough protein, and not eating a huge sweet dessert right after a high-protein meal all help. I'm also a huge fan of digestive enzymes for people who feel heavy after meals; our Digestive Enzyme Complex is a vegan blend of 14 enzymes taken with meals.† More in our guides to low stomach acid and bitter herbs.
4. Keep things moving
Constipation is the biggest enemy of any cleanse and a burden on gut health in general. Learn your fibers (most people are short on both soluble and insoluble), hydrate, and add a stool bulker like soaked chia seeds. Our guide to natural remedies for constipation walks through the order I use.
5. Find your trigger foods
New sensitivities often develop when the gut lining has been struggling for a long time. The foods I see most often are dairy, gluten, eggs, soy, peanuts, lentils, artificial dyes and black pepper. A structured elimination diet is the most practical way to find yours.
6. Feed and repair the gut lining
Healthy gut bacteria eat prebiotic fiber and make short-chain fatty acids like butyrate, which fuel and help repair the gut lining. When that process isn't working smoothly, people often fear fiber and get stuck in a loop of avoiding the very foods that make butyrate. To break the loop, I use arabinogalactan (a gentle prebiotic), a calcium-magnesium butyrate, colostrum, L-glutamine and bone broth. In my experience, these work better here than herbal options like slippery elm.
Our GI Health and Gut Lining Support Protocol combines Butyric Acid, Arabinogalactan, Colostrum and our Multi-Strain Probiotic Complex. Our guides to butyrate and the best and worst foods for gut lining health cover the food side.†
What Customers Report
As of October 2026, our GI Health and Gut Lining Support Protocol has 95 customer reviews averaging 4.88 out of 5: 85 five-star, 9 four-star and 1 three-star. Nineteen reviewers mention less bloating. Not every part worked for everyone: the three-star reviewer found the butyric acid very effective but didn't notice anything from the colostrum or probiotic. Results vary.
7. Choose probiotics wisely
Probiotics have become a marketing game: the most CFUs, the most strains, probiotics added to everything. It's not rocket science. You want specific strains that colonize the gut, in an enteric-coated capsule. I'm a big fan of shelf-stable probiotics, because practitioners I've interviewed sent refrigerated products for testing and many had no live strains left. Our Multi-Strain Probiotic Complex is enteric-coated and shelf-stable.† During a cleanse, spore-based probiotics and S. boulardii are also worth considering. Learn more about what CFUs actually mean.
8. Manage stress and protect your sleep
Sit down to eat and take a few breaths before your first bite. Get some sunlight and a few minutes of quiet before work. Cut screens around 8 p.m. so your cortisol can come down at night. Stress and gut health feed into each other, so working on one helps the other. More in our guide to the gut-brain connection.
9. Hydrate with minerals
Drink good spring or mineral-rich water and get electrolytes from whole foods like quality greens and fruit. Many people add trace minerals to their water; our Fulvic Acid & Trace Ocean Minerals provides 70+ ionic minerals in liquid form.†
10. Address overgrowths with a practitioner
If testing shows an overgrowth, that's when targeted protocols come in, ideally with a practitioner's guidance and only after the colon is moving well. Our guides cover getting rid of SIBO naturally, the candida cleanse protocol, how to do a parasite cleanse and the difference between candida and SIBO.
How Long Does It Take to Heal Your Gut?
There's no true overnight gut reset. Some changes, like less bloating after cutting sugar or eating more calmly, can show up within days. But rebuilding a healthy terrain usually takes about three months of consistent changes, and longer if there's a significant overgrowth or a long history of gut issues. Supplements like butyrate are there to break a cycle while you rebuild, not to take forever. The long-term goal is a gut that does its job on its own.
Our Gut Health Guides
When to See a Doctor
See a doctor promptly for blood in your stool, black stools, unexplained weight loss, persistent vomiting, trouble swallowing, severe or worsening belly pain, symptoms that wake you up at night, or new digestive symptoms after age 50. Natural approaches work best alongside proper medical care, not instead of it.
The Bottom Line
Improving gut health isn't about one supplement or one diet. It's about rebuilding the terrain: finding out what's really going on, eating more plants, fermented and bitter foods and less sugar, digesting well, keeping things moving, supporting the gut lining, managing stress and giving it time. Don't take your digestion for granted. It's working for you every day.
References
Palleja A, Mikkelsen KH, Forslund SK, et al. Recovery of gut microbiota of healthy adults following antibiotic exposure. Nat Microbiol. 2018;3(11):1255–1265. doi:10.1038/s41564-018-0257-9
McDonald D, et al. American Gut: an open platform for citizen science microbiome research. mSystems. 2018.
Wastyk HC, et al. Gut-microbiota-targeted diets modulate human immune status. Cell. 2021.
Vanuytsel T, van Wanrooy S, Vanheel H, et al. Psychological stress and corticotropin-releasing hormone increase intestinal permeability in humans by a mast cell-dependent mechanism. Gut. 2014;63(8):1293. PMID 24153250
