Myths and Misperceptions about Pre-, Pro-, and Postbiotics

This quiz is for on-demand attendees of the presentation “Myths and Misperceptions about Pre-, Pro-, and Postbiotics” from the Purina Institute Microbiome Forum Virtual Event 2025. In order to obtain your RACE certificate for 0.5 CE hours, you must get a score of 80% or higher. You can retake the quiz as needed to pass.

This webinar is eligible for RACE credit through 15 December 2027.

1 / 5

Probiotics are:

Live microorganisms that colonize the intestine and confer a beneficial effect.

Live microorganisms that confer a beneficial effect when administered in adequate amounts.

Live microorganisms that have a beneficial effect when ingested in adequate amounts.

Live bacteria that have a beneficial effect when administered in adequate amounts.

2 / 5

Prebiotics are:

The food source for probiotics and should be administered together.

They help restore the balance of the intestinal microbiota in cases of dysbiosis.

Ingredients or substances that are not digested in the small intestine and are selectively fermented mostly by bifidobacteria in the colon to produce a beneficial effect.

All options are valid.

3 / 5

The ISAPP definition of postbiotics implies that postbiotics are:

Metabolites produced by probiotics that are capable of exerting a beneficial effect.

Metabolites produced by resident microbiota that are capable of exerting a beneficial effect.

Inanimate microorganisms and/or their components that are capable of exerting a beneficial effect.

Non-viable bacteria and/or their components capable of providing a beneficial effect.

4 / 5

Which of the following is TRUE regarding probiotics?

Choose a probiotic or postbiotic according to its evidence of efficacy for the condition you’re looking to treat/manage, not the number of strains or CFU. More is not necessarily better.

All probiotics are the same

Probiotics with the same genus and species name will have identical action and benefits

Probiotics must survive the stomach and colonize the intestine in order to be effective

5 / 5

Which of the following is FALSE regarding choosing a biotic product?

Check product labeling for the strain designation and dosage matching clinical studies for the target condition

Choose biotics based on evidence, not marketing claims

Choose a probiotic or postbiotic according to its evidence of efficacy for the condition you’re looking to treat/manage

Choose a product with more strains and/or more CFU

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