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Quiz: How Much Do You Really Know About Probiotics?

3 minute read


With all the articles linking probiotics to our overall health, we can sometimes get our facts confused. Try this quiz if you want to test your own knowledge about these powerful bacteria, and see just how you fare with a test on probiotics.

Q1: You can get probiotics from consuming:

A. Fermented foods
B. Vegetables
C. Fruits

Q2: Prebiotics are:

A. “Bad” types of bacteria
B. Fiber that sustains healthy gut bacteria
C. Supplements for kids

Q3: The bacteria in your body outnumber your own cells by a ratio of _____ to 1:

A. 100
B. 10
C. 5

Q4: Most gut bacteria can be found in the:

A. Stomach
B. Small Intestines
C. Large Intestines

Q5: True or False -
Infants don’t start collecting healthy gut bacteria until they’re about 6 months old.

A. True
B. False

Q6: Which is not a good method for collecting healthy gut bacteria?

A. Eating kimchi
B. Using antibiotics
C. Having yogurt for breakfast

Q7: The total weight of the probiotics in our system is heavier than our:

A. Brain
B. Stomach
C. Eyes

Q8: True or False -
Probiotics only live in our digestive system.

A. True
B. False

Q9: Approximately how many probiotic strains live in our bodies?

A. 150
B. 400
C. 1,000

Q10: “Probiotic” is Latin and Greek for:

A. Promoting life
B. Promoting health
C. Promoting plants

Now, tally up your answers and refer to the answer key below to see how you did!


Answer Key:

1. A
2. B
3. B
4. C
5. B-False
6. B
7. A
8. B -False
9. B
10. A

1-4 Correct: This was a challenging quiz, so don’t feel bad about struggling a little. If possible, try reading some of our other articles to learn more about probiotics!

5-7 Correct: Great job! You’re well on your way to becoming a pro on probiotics. If you want to learn more, check out our full articles about these healthy bacteria.

8-10 Correct: A+ Excellent! You’re well-versed on the world of probiotics. You win!



  1. https://authoritynutrition.com/probiotics-101/
  2. http://probiotics.org/amazing-facts/