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Prebiotic vs. Probiotic – What’s the Difference?

Written by: Adrienn Myers-Woods

I will never forget the look of terror on my toddler’s face as I begged her to please just eat her yogurt because it has “lots of good bacteria.” Up until this point, she knew that bacteria and germs were bad news, and that you could wash your hands to get rid of the bad guys. It took a few different conversations, some pinky promises, and a few samples of different yogurt varieties, but she was finally convinced that the “good bacteria” were good guys, and they were there to help her tummy and overall health. Now you are not a toddler, obviously. But the world of good and bad bacteria, prebiotics vs. probiotics, can still be pretty confusing.

What are they?


So let’s break down what these good guys are, and how they’re different. Prebiotic foods are typically dietary fiber-rich, like whole grains, leafy greens, garlic, bananas, and onions. These complex carbohydrates “feed” the beneficial gut bacteria, especially in your gastrointestinal tract. Prebiotics don’t actually contain live bacteria, but instead stimulate the growth of important live microorganisms to promote digestive health. Including these prebiotic foods in your diet can offer significant health benefits, supporting everything from digestion to immune function.


Probiotics are live microorganisms found in a dietary supplement or food that add to the already important population of healthy gut bacteria and the rest of your body. The most common strains for probiotic supplements are Lactobacillus and Bifidobacterium. You can find them in fermented foods like yogurt, kombucha, and sauerkraut.

Prebiotics don’t actually contain live bacteria, but instead stimulate the growth of important microorganisms to promote digestive health. The role of probiotics include helping with gut health and function, supporting your immune system, and keeping your vagina happy and healthy. Both of these big helpers can promote regular bowel movements, just in time for the holidays.

To break it down even further, probiotic foods add to the good stuff, prebiotics feed the good stuff that’s already there.

How to use probiotics and probiotics?

Now we know what pre and probiotics are, but when should you use them, and how? Prebiotics have been shown to improve satiety (aka feeling full), and weight loss. Probiotic bacteria is often recommended after use of antibiotics, or other conditions like food poisoning or a stomach bug which could throw off your GI digestive tract, gut flora, and gut microbiome. A probiotic is also found helpful by many people who have recurrent vaginal or bladder infections. The role of probiotics for vaginal health is complicated, but has several health benefits. After rounds of antibiotic treatment, your body may need help repopulating all the “good guys.” And both pre and probiotics can help with some common digestive system issues like bloating and constipation.

Now you’re armed with all this great information. . . but which prebiotic supplement and probiotic supplement do you choose? It seems like there’s hundreds, they’re all packaged differently, the names are confusing, what’s a girl to do?! You can always start by reaching out to your healthcare provider for their recommendation for women’s health probiotics, and they can make sure you’re choosing a product that is safe for you. And of course, do your own research, don’t break the bank, and consider purchasing a reputable brand like pH-D® Feminine Health.

Adrienn Myers-Woods, WHNP, APN is a board certified Women's Health Nurse Practitioner. She completed her undergraduate degree in Nursing at Truman State University and was commissioned into the Army Reserves through the ROTC program. She received her Master of Science in Nursing with a specialty in Women's Health from Vanderbilt University.  Adrienn has 7 years of experience as a nurse practitioner in various fields ranging from fertility/IVF, family planning, and routine gynecologic care. Her goal is to provide high quality care, but also high quality education to each and every patient. 

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