Prebiotic Fiber and Probiotics

Prebiotic fiber is the food that feeds beneficial gut bacteria; pairing it with a daily probiotic supplement is among the most-studied gut-health combinations. Known as a synbiotic approach, this strategy is supported by Bio-K+'s more than 30 years of probiotic science.

Explore Bio-K+ Probiotic Drinkables

Prebiotic Fiber and Probiotics

Prebiotic fiber is the food that feeds beneficial gut bacteria; pairing it with a daily probiotic supplement is among the most-studied gut-health combinations. Known as a synbiotic approach, this strategy is supported by Bio-K+'s more than 30 years of probiotic science.

Explore Bio-K+ Probiotic Drinkables
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What is prebiotic fiber?

Understanding what is prebiotic fiber starts with one key distinction: not all dietary fiber is prebiotic. Prebiotic fiber is a specific type of non-digestible fiber that is selectively fermented by beneficial gut bacteria, conferring a health benefit. Cellulose, for example, is a dietary fiber but not classically prebiotic. Inulin, FOS, and GOS are. The USDA Dietary Guidelines classify dietary fiber under food guidance. The ISAPP definition frames prebiotics as substrates selectively utilized by host microorganisms to confer a benefit.

Read on for food sources

Types of prebiotic fiber: inulin, FOS, GOS, pectin, beta-glucan

The most-studied prebiotic fiber types each come from different food sources. Inulin prebiotic fiber, derived from chicory root, asparagus, and leek, is one of the most researched. FOS (fructooligosaccharides) are found in banana, garlic, and onion. GOS (galactooligosaccharides) come from legumes and some dairy. Pectin is abundant in apples and citrus. Beta-glucan is found in oats and barley. Each type is selectively fermented in the colon, supporting a diverse and balanced gut microbiome.

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Prebiotic fiber foods: a Canadian list

A diverse diet rich in prebiotic fiber foods is the foundation of a healthy gut microbiome. Top sources include garlic, onion, leek, asparagus, Jerusalem artichoke, dandelion greens, oats, apple, banana, and legumes. The Dietary Guidelines for Americans recommend 25g of fiber per day for women and 38g for men. Aiming for at least 5g of that total from prebiotic-rich sources is a practical target. Pairing these foods with a daily Bio-K+ probiotic supplement completes the synbiotic equation.

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How prebiotic fiber feeds probiotic bacteria: the synbiotic effect

Probiotic bacteria ferment prebiotic fiber in the colon, producing short-chain fatty acids — butyrate, propionate, and acetate. These SCFAs are produced as part of normal fermentation in the colon. The combination of a probiotic and prebiotic is called a synbiotic, a pairing that has been the subject of extensive gut-health research. Bio-K+ Original Drinkable promotes, supports or maintains digestive and immune health,* making it a practical daily choice for a synbiotic routine.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

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Prebiotic fiber vs fiber: what is the difference?

The prebiotic fiber vs fiber distinction is often misunderstood. Dietary fiber is the broad category of all plant-based, non-digestible carbohydrates. Prebiotic fiber is a subset: fiber selectively fermented by beneficial gut bacteria to confer a health benefit. Insoluble fibers like cellulose add bulk without being classically prebiotic. Probiotics are live beneficial bacteria. A synbiotic brings the two together. Pairing prebiotic fiber with a daily probiotic supplement is the core of a synbiotic approach.

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How to combine prebiotic foods with Bio-K+ for maximal benefit

Pairing a daily Bio-K+ probiotic with prebiotic-rich foods is the most practical synbiotic approach for Canadians. Bio-K+ Original Drinkable contributes to a healthy digestive and flora health. Bio-K+ Daily Care Probiotic Capsules help support gastrointestinal health, a convenient daily NHP product for Canadian consumers. Try oats with banana at breakfast or salads dressed with garlic and leek. Bio-K+ has been rooted in probiotic science for more than 30 years.

Common questions on starting a prebiotic fiber routine

Increasing prebiotic fiber intake too quickly can cause temporary bloating as the gut microbiome adapts. Increase gradually, add one prebiotic-rich food at a time over several weeks. Canadians with FODMAP sensitivity may find high-FOS foods like garlic and onion harder to tolerate at first; speak with a Canadian healthcare practitioner or registered dietitian if you follow a low-FODMAP diet. Drink adequate water throughout the day to support fiber transit. If digestive symptoms persist, speak with a Canadian registered dietitian or healthcare practitioner.

Frequently Asked Questions

What’s the difference between fiber and prebiotic fiber?

The prebiotic fiber vs fiber distinction comes down to selectivity. All dietary fiber is non-digestible by humans, but only prebiotic fiber is selectively fermented by beneficial gut bacteria to confer a health benefit. Examples of prebiotic fiber include inulin, FOS, GOS, pectin, and beta-glucan. Insoluble fibers like cellulose add bulk without being classically prebiotic. Both types have value in a balanced diet. Prebiotic fiber adds the specific gut-bacteria-feeding function.

How much prebiotic fiber should I eat daily?

The Dietary Guidelines for Americans recommend 25g of total dietary fiber per day for women and 38g for men. A practical target is to have at least 5g of that total come from prebiotic-rich sources such as garlic, oats, asparagus, and bananas. Increase fiber intake gradually to support gut microbiome adaptation and tolerance. Pair adequate water with any fiber increase to support transit. For personalized guidance, speak with a registered dietitian.

What foods are highest in prebiotic fiber?

The richest prebiotic fiber foods include garlic, onions, leeks, asparagus, and Jerusalem artichokes. Other strong sources are oats, bananas, apples, dandelion greens, and legumes. Including a variety of these foods daily helps feed a diverse gut microbiome. Pairing them with a daily Bio-K+ probiotic supplement completes the synbiotic equation, with Bio-K+ Original Drinkable promoting, supporting or maintaining digestive and immune health* as part of a fiber-rich diet.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Can I take a prebiotic fiber product instead of eating prebiotic foods?

Whole prebiotic fiber foods are the most evidence-supported foundation, providing fiber alongside additional nutrients. Inulin-based and FOS-based prebiotic fiber supplements, available at health food stores, can complement a fiber-rich diet. Introduce any added prebiotic fiber gradually to support tolerance. If you have IBS or another digestive condition, speak to a healthcare practitioner before increasing prebiotic fiber intake. Bio-K+ does not currently market a standalone prebiotic fiber supplement.

Are prebiotic fiber and probiotics safe to take together?

Yes, combining them is exactly the synbiotic probiotic prebiotic approach that research supports. A synbiotic pairs live probiotic bacteria with the prebiotic fiber they ferment, combining them in a daily routine for complementary effect. Bio-K+ Original Drinkable, paired with a fiber-rich diet, promotes, supports or maintains digestive and immune health* as part of a practical daily routine. Some users experience temporary bloating during the ramp-up phase; introduce prebiotic fiber gradually to support tolerance. Speak to a healthcare practitioner if you have a diagnosed digestive condition.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.