Earlier this year, as everyone else was committing to new workout plans and healthier diets, I took up drinking. No, not alcohol, but something a little different: kombucha, a fizzy, functional fermented tea. (For the record, it does contain a very small amount of alcohol from fermentation.)
With gut health in mind, I decided to try a 10-week fermented foods challenge, building upon a daily kombucha habit and seeing how it might benefit me. Fermented foods have long been associated with digestive health, and even those that don’t contain live probiotics can still deliver beneficial compounds created (or enhanced) during fermentation.
I was inspired by a small study that suggested eating fermented foods daily for two to three months may lead to meaningful changes in the gut microbiome—the community of bacteria that plays a role in overall health. The general idea is that when your gut is happy, it can have a ripple effect on everything from digestion to mood.
How I structured my 10-week experiment
To keep things manageable—and to observe how my body responded—I divided the experiment into three phases:
- Weeks 1 to 4: Drink 4 ounces of kombucha twice daily.
- Weeks 5 to 8: Add fermented dairy, including Greek yogurt and kefir (mostly in the mornings).
- Weeks 9 to 10: Expand to include foods like sauerkraut, miso, and sourdough.
Selecting a kombucha
Kombucha is something I can drink almost any time of day, and it requires zero prep, which makes it one of the easiest ways to build a fermented food routine. But I’m particular about the level of fizz—some brands are definitely bubblier than others.
I ultimately chose Health-Ade for this experiment because it has the flavors and level of carbonation I like, along with both refrigerated bottles and shelf-stable cans. The company also guarantees 1 billion CFU probiotics at the time of bottling—an amount that research suggests may support general gut health if consumed every day. (Since probiotic levels vary due to factors like fermentation time and pasteurization, a heat treatment that kills both harmful and beneficial bacteria, some brands add probiotics back in before bottling.)
It’s worth noting that kombucha contains sugar because it’s necessary for its fermentation process. Sometimes it’s also used to alter the flavor. If you’re worried about the sugar content, consider that a 12-ounce can of Health-Ade Pink Lady Apple kombucha contains 14 grams of sugar (including 10 that are added), while a 6-ounce Honest Kids apple juice box contains 8 grams of sugar, and a 12-ounce can of Canada Dry ginger ale contains 33 grams of sugar.
What happened during the 10-week challenge
Drinking kombucha daily was an easy ritual, but I gave myself some grace when I didn’t follow my plan perfectly. By week four, I noticed less bloating and felt lighter throughout the remainder of the trial.
However, there was one benefit that truly caught me off guard: fewer sweet cravings. After something tangy like kombucha, overly sweet foods lost some of their appeal. I typically drank 1 four-ounce serving late in the afternoon and the other after dinner—times when I’m more likely to reach for something sweet.
When it came time to add fermented dairy, I did feel a little yogurt fatigue after a couple of weeks. I even skipped yogurt once or twice and had to make up for it as a last-minute evening snack. My yogurt-chia puddings and overnight yogurt parfaits began to feel repetitive, so I switched things up.
One favorite new option was a trending overnight yogurt combo sometimes called “Japanese cheesecake,” where cereal or biscuits soften overnight in yogurt. I’d use whatever I had on hand—Grape-Nuts, granola, even graham crackers—and top it with fruit.
I also added kefir to my smoothies and came up with a new go-to: a “red velvet” smoothie made with yogurt, cocoa powder, vanilla whey protein, dates, freeze-dried raspberries, and soy milk.
While I was at it, I experimented with kombucha mocktails. One favorite was a cream soda-inspired combo—kombucha poured over tangy kefir. But honestly, I didn’t need to get that creative. I enjoyed the kombucha on its own.
At weeks six and seven, my stool consistency improved. While I don’t have IBS, I do manage GERD (chronic acid reflux), and like many people, my digestion can vary. The beneficial shifts in digestion I experienced could have been natural ones, or they may have been influenced by the kombucha or a combination of other factors, including consuming less sugar after the winter holidays, eating more fiber, and staying more hydrated. Plus, I admit, overall I was feeling less stressed.
The toughest part was adding yet another fermented food in the final phase. It would have been easy to stick with kombucha and yogurt or kefir.
I leaned into miso, sourdough bread, and finally some sauerkraut. I enjoyed miso noodle soup as a lunch option or sipped warmed miso broth closer to bedtime when I realized I hadn’t checked that box for the day. Sourdough showed up mainly in sandwiches and avocado toast (when the bread was still available as my 17-year-old girls tend to eat it all up). Sauerkraut was less common because I mostly enjoy it with heartier meals like brisket, which was perfect for St. Paddy’s Day. Leftovers became a brisket and sauerkraut sandwich on rye (a.k.a. a Reuben).
The bottom line
Drinking kombucha every day for 10 weeks turned out to be both doable and enjoyable for me. It’s convenient, portable, and requires no effort—making it one of the simplest ways for me to incorporate fermented food into my routine. Over time, I noticed less bloating, fewer sweet cravings, and better bowel movements. When the experiment was over, I still found myself reaching for kombucha. Like my daily coffee, this habit may just stick with me.
