What's commonly discussed — for how you want to feel.

A soluble fiber found in oats and mushrooms, studied for effects on cholesterol and often discussed with gut health.

Chia seedsFood

Tiny seeds rich in soluble fiber, plant omega-3 (ALA), and minerals.

Plant carbohydrates your body does not fully digest. One of the most established nutrients for digestion and gut health.

OatsFood

A whole grain known for beta-glucan, a soluble fiber with well-studied cholesterol effects.

YogurtFood

Fermented dairy providing live cultures and protein.

A yellow compound found in plants such as barberry and goldenseal; sold as an extract.

KimchiFood

Korean fermented vegetables providing live cultures and fiber.

The most abundant amino acid in the body, also found in protein-rich foods; sold as a supplement.

MushroomsFood

Fungi providing beta-glucan fiber and, when UV-exposed, vitamin D.

NattoFood

Fermented soybeans — a traditional Japanese food and one of the richest known sources of vitamin K2.

A large family of plant compounds found in berries, cacao, tea, and colorful vegetables. Widely studied for antioxidant properties.

SeaweedFood

Sea vegetables providing fiber and minerals, common in Japanese cuisine.

Live microorganisms found in fermented foods such as yogurt, kimchi, and natto. Often discussed in relation to gut health; effects appear strain-specific.

AyranDrink

A savory, frothy drink of yogurt whisked with water and a little salt, served cold with meals across Turkey, the Balkans, and Central Asia; it carries protein and calcium from the yogurt plus some sodium, along with live cultures.

Black beansFood

A dark legume eaten cooked. A dietary source of plant protein, fiber, and folate.

ChickpeasFood

A round legume (garbanzo) eaten cooked or as hummus. A dietary source of plant protein, fiber, and folate.

EdamameFood

Immature soybeans eaten from the pod. A dietary source of complete plant protein, folate, and fiber.

FlaxseedFood

Small seeds usually ground before use. A dietary source of alpha-linolenic acid (a plant omega-3 fat), fiber, and lignans.

Greek yogurtFood

A strained cultured dairy product. A dietary source of protein, calcium, and live cultures.

A supplement form of inulin, a prebiotic dietary fiber (a fructan) found in plants such as chicory root and Jerusalem artichoke. Stirred into water or food as a powder, or taken as capsules.

KefirDrink

A cultured, drinkable fermented milk. A source of protein, calcium, and live cultures.

Kidney beansFood

A red legume eaten cooked. A dietary source of plant protein, fiber, and folate.

KvassDrink

Kvass, a traditional Russian, Ukrainian, and Baltic lacto-fermented beverage made from rye bread (or rye malt) and water, lightly sweet and tangy; fermentation leaves a trace of alcohol, typically about 0.5–1% ABV. An everyday fermented drink.

A supplement providing lactoferrin, an iron-binding glycoprotein naturally present in cow's and human milk and in other bodily fluids; supplement forms are usually purified from cow's milk. A common ingredient in Japanese functional-food products, taken as tablets or capsules, often enteric-coated.

LassiDrink

A South-Asian blended yogurt drink, served sweet (often with mango or rosewater) or salted; made from cultured yogurt thinned with water, it carries protein and calcium from the dairy along with the live cultures of the yogurt.

MisoFood

A fermented soybean paste used as a seasoning in Japanese cooking; a source of protein, isoflavones, and probiotics.

OatmealFood

A hot porridge of rolled or steel-cut oats cooked in water or milk; whole oats are a recognized source of fiber, including the soluble fiber beta-glucan, along with some magnesium and iron.

PicklesFood

Cucumbers brined and steeped in a salt-and-vinegar solution, typically with dill; a salty, tangy condiment eaten alongside meals.

Pinto beansFood

A speckled legume eaten cooked or refried. A dietary source of plant protein, fiber, and folate.

Prebiotic sodaDrink

A category of lightly sweetened carbonated soft drinks formulated with added prebiotic fiber (commonly inulin from chicory root or agave), and in some products a splash of apple cider vinegar; a can typically supplies a few grams of fiber. A modern soda-alternative category, not a specific brand.

A supplement containing live beneficial bacteria such as lactic-acid bacteria and bifidobacteria, taken as capsules, tablets, or powder.

Probiotic drink (cultured milk)Drink

A category of sweetened cultured-milk beverages fermented with lactic acid bacteria and sold as small daily bottles or 'drinkable yogurt'; it carries lactic-acid cultures (probiotics), which may be live or heat-inactivated depending on the product.

SauerkrautFood

Finely shredded cabbage fermented in its own brine, common in Central & Eastern Europe; a source of fiber and vitamin C, and when raw a source of probiotics.

Sourdough breadFood

Bread leavened by a naturally fermented starter of wild yeast and lactic bacteria; a source of selenium and fiber.

SoybeansFood

A protein-rich legume. A dietary source of complete plant protein, fiber, and isoflavone plant compounds.

TempehFood

A firm fermented soybean cake. A dietary source of complete plant protein and fiber.

TepacheDrink

A lightly fermented Mexican drink made from pineapple rind and pulp with unrefined cane sugar (piloncillo) and warm spices, fermented a few days into a tangy, faintly fizzy beverage; the short fermentation gives it live cultures.