Gaby
Everyone wants gut-friendly foods that won’t break the bank. Keep them simple, unprocessed (or minimally processed), and free from emulsifiers, modified starches, and sweeteners. That’s the advice of Dr. Chris van Tulleken, a British nutrition expert, author, and TV presenter.
Tim Spector, a British gut microbiome researcher, epidemiologist, and author, argues that fermented foods help strengthen this vital system. Fermented foods contain probiotics—live beneficial bacteria and yeasts—found in some cheeses, kefir, full-fat live yogurt, vinegar, and olives.
The most affordable, widely available support for gut health comes from prebiotics. These nondigestible compounds in food feed the microbiome and are abundant in fruits, vegetables, and legumes. Spector points out that you don’t have to buy expensive products to get these benefits. Frozen fruits and vegetables are also a great option—they retain the same nutrients as fresh ones.
Experts have put together a short list of probiotic and prebiotic foods that, in their least processed forms, can nourish your gut without draining your wallet.
Cheese
Cheese can be high in salt and fat, but it’s also a beloved source of bacterial cultures—often richer than fermented vegetables. Bronwen Percival, co-founder of a website focused on fermented foods, says the bacteria that develop as cheese ages can boost gut microbial diversity.
That effect is strongest in cheeses made from unpasteurized milk, which pregnant people and those with weakened immune systems should avoid. Pasteurization kills many microorganisms, but even pasteurized cheeses can develop probiotic bacteria during aging.
Olives
Olives do more than deliver monounsaturated fats, says dietitian and author Federica Amati. They’re also rich in polyphenols, which help gut bacteria thrive.
Vinegar (not just apple cider)
All vinegars undergo fermentation—not just apple cider. They’re cheap and easy to make at home. Vinegar often contains a “mother”: a cellulose matrix populated by acetic acid bacteria. When alcoholic liquids ferment, acetic acid forms, which can support gut function.
Mushrooms
Mushrooms offer health benefits that don’t always show up in the price. Try different varieties, including affordable ones. Each type brings a unique mix of plant compounds, Spector says. Even common button mushrooms are helpful: they’re rich in fiber that feeds the gut microbiome and contain bioactive compounds not found in many other foods.
Legumes
“Legumes are an excellent source of fiber and other beneficial plant compounds, such as polyphenols, that support our gut microbes,” says Federica Amati.
Dark Chocolate
Spector recommends high-quality dark chocolate with at least 70% cocoa for gut health. Cocoa is rich in polyphenols, and the lower sugar content makes it easier to enjoy in moderation. Many chocolate lovers also prefer the deeper, bitter flavors of high-cocoa bars.
Sourdough Bread
Sourdough is sometimes called a live food, but that’s not entirely accurate—the probiotics in sourdough die during baking. Its gut benefit comes mainly from the fiber it contains, though the fiber’s bioavailability depends on how the bread was processed.
You can try baking sourdough at home. Aim for a slowly fermented starter (preferably overnight) made from whole grains ground on a stone mill. “Good sourdough bread is beneficial for most people. Bad sourdough bread is likely just as harmful to health as any other bread,” Spector says.
