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PB 8 Review - Does This Probiotic Really Work? Are side effects and customer complaints deal breakers?

  • 15 User Comments
  • Rating: 3.9. From 47 votes.
By Summer Banks Dec 08, 2016

Give me two minutes of your time and I’ll tell you whether PB8 probiotic actually works. We dug deep and did one of our in-depth reviews, examining the ingredients, side effects, clinical studies and overall customer service. We additionally looked at hundreds of user comments and customer responses from all over the internet. Lastly, we compressed all of the information we collected to give you the bottom line.

PB 8 Readers: Click here to find out why we're giving away samples of our product, Leptigen.

What is PB8?

To start with, PB8 is a probiotic supplement that supports digestive health. The ingredients include rice maltodextrin, inulin, lactobacillus acidophilus, lactobacillus plantarum, lactobacillus rhamnosus, lactobacillus casei, lactobacillus paracasei, lactobacillus salivarius, bifidobacterium bifidum and bifidobacterium longum. It is taken daily (two capsules). It aims to restore good bacteria, help with regularity and reduce common issues like bloating and gas.

This supplement has been available since at least 2011. It is made by Nutrition Now. This formula is vegetarian. It’s also free of dairy, gluten, soy and preservatives. It’s easy to find PB8 probiotic via websites like Amazon and vitaminshoppe.com. Also, there are all sorts of helpful user comments posted on the web, but read on…

Side Effects – “Concerned At All?”

The first issue we have is with Nutrition Now PB8 side effects. According to our Research Editor, “Some users have complained of adverse reactions such as gas, bloating, constipation, diarrhea, abdominal discomfort and nausea.”

One customer reported, “After taking the recommended 2-per day, I started having really bad stomach cramps and bad gas. I discontinued use.”

Then again, a different user had this to say, “Not bad. I have been taking it for a few weeks and it has upset my stomach a few times.”

“Decent product. Not as effective as I’d hoped,” mentioned another.

Customer Complaints – “Be Careful”

Another concern is customer complaints and discouraging user comments. For instance, one person said, “Every time I take one of these, I am so miserable with cramps and constipated. Only probiotic that does that to me.”

However, another user posted, “It does keep my bowels moving better than nothing at all.”

“Although the price was okay for the product, the jury is still out for a repeat purchase. I can’t say that I noticed this product was doing its job,” revealed another individual.

Our research has shown if there is some particular part of a diet supplement or health product that is especially bothersome (side effects, customer complaints, low Amazon star rating) the odds of real results for the long term are not good. Therefore, if PB8 does in fact cause unpleasant reactions in a lot of people, this could be a serious drawback.

The Science – “Solid?”

Here at DietSpotlight, we prefer to see some solid clinical research that supports the product we’re reviewing. However, we did not pinpoint any actual studies that back up PB8 probiotic as a weight-loss solution. However, it is thought that poor diet can lead to less healthy bacteria, so this could help fight this.

The Bottom Line – Does PB8 Work?

Okay, now the moment you’ve been waiting for. Here is our bottom line on PB8. First off, we like that this supplement contains healthy bacteria to potentially balance the digestive tract. It’s also nice to see that this formula is easy to take anywhere. But we have some reservations about this product because it’s not backed by any published studies. Also, we’re concerned about the side effects that some users have reported.

If your goal is to boost fat loss and increase metabolism, then we recommend you go with a product that’s backed by documented research. It should also not cause any harsh side effects and be supported by encouraging user reviews.

Among the best products we’ve seen in 2016 is one called Leptigen. This formula offers four key ingredients, which are shown in research to help increase metabolism and fat loss. We have not discovered any user complaints at all. Also, the customer comments posted online show people are seeing good results.

The makers of Leptigen are so excited about their product they’re offering every customer a Special Trial Offer.

Previous PB 8 Review (Updated August 19, 2013):

What You Should Know

PB 8 is a probiotic supplement manufactured by Nutrition Now. The supplement contains several sources of probiotics to restore healthy bacteria in the intestine. When eating fast food or taking antibiotics, normal healthy bacteria levels can dwindle below normal levels. Probiotics can also be found in foods like yogurt and some other dairy products. PB 8 sells online for $11.46 per 120 capsule bottle. The official website for Nutrition Now does not sell PB 8 directly, but the product can be found through other online retailers.

List of Ingredients

Proprietary Blend (Rice Maltodextrin, Inulin, Lactobacillus acidophilus, Lactobacillus plantarum, Lactobacillus rhamnosus, Lactobacillus casei, Lactobacillus paracasei, Lactobacillus salivarius, Bifidobacterium Bifidum and Bifidobacterium longum).

Product Features

When the lower intestine and colon are forced to process high fat foods and foods commonly found on fast food menus, the probiotic levels can fall. Taking antibiotics can also lead to fewer probiotics in the intestine because antibiotics cannot simply kill off bad bacteria. In recent years, probiotics have become a popular addition to daily menus via yogurt and other dairy foods. PB 8 offers a healthy source of probiotics with 14 billion bacteria in each serving. It is common for probiotics to be measured in the billions. Unlike acidophilus and lactobacillus supplements, PB 8 does not stop with just one type of healthy bacteria. There are a total of eight strains of bacteria included in the one supplement serving. Typically, environmental factors can also lead to a lowering of probiotic levels so regular maintenance is needed even if the dieter has changed their eating habits. When starting a weight loss program, it is a good choice to take a supplement like PB 8 to restore healthy bacteria to normal levels. These bacteria will not increase weight loss, but will improve digestion and the metabolization of weight loss supplements. If supplements are not absorbed correctly, the formula can be perfect and the dieter will not achieve the full benefits of the supplement. Probiotics are known to cause bloating, gas and changes in bowel movement. Some dieters may need to start out taking a lower than suggested dose of PB 8 in order to work up to the highest dose without suffering these common side effects.


  • A complete list of ingredients is published on the official website.
  • PB 8 is easy to buy online.
  • Healthy bacteria are good for digestive function.


  • Weight loss will not likely increase.


There is only so much a proven fat burner can do if the digestive system is not working properly. When changing from an unhealthy diet full of processed foods and unhealthy fats, taking a probiotic supplement like PB 8 is a good choice to restore digestive health.
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About the Author:

Summer Banks, a content strategist at Leptigen, has researched over 5000 products in the past 10 years. She has years of nursing training, experience as a manager responsible for 15 supplement brands, and completed coursework on Food and Nutrition from Stanford University. full bio.

Rating: 3.9. From 47 votes.
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15 Comments on "PB 8 Review"


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I’ve been taking PB8 for about a month now. I have experienced none of the side effects that others have complained about. FYI, I also eat Activia Light yogurt twice a day (morning and night). My experience is not breathtaking, but I can attest to the fact that I’m very regular (like clock work) and have no stomach issues whatsoever (even after eating my favorite food – spicy Mexican…the hotter the better). Without going TMI, I’ll just say that everything is disposed of quite nicely. wink I intend to stay on it for a while and see how things go over a longer period of time.

do you get diarrhea taking pb8

Yes Anna I got diarrhea on the PB 8. I just started taking this, only ddi it once so far… I was also wondering if diarrhea is a side effect… sad

Such has been reported from similar products. If after continuing PB 8 the diarrhea persists please take a break from the formula.

can I take 2 pills a day? There are NO directions on how many pills to take. I need toknow.thanks.

I just started takeing it what do i need to. do now how will i notice if it is working i hv cronic constipation real bad

i take PB8 and will it cause light head or dizzy spells, that is what i seem to be getting sense taking them..please return answer i would appreciate very much..eugene

i’ve also experienced light head dizzying spell on PB8. Drinking water helps reduce this, it still occasionally happens.

Hello Ashley, All users are different and can experience different results; please make sure to consult with your physician before continuing this product to make sure its safe and effective for you to use.

Take on empty stomach or with food?

I take my pb8 before I eat anything and first thing after I get up, I think if you take it the same time everyday it eliminates some problems, I was taking prilosec and heard that it was a dangerous drug and read how to wean myself off of it, now I just take pb8 and I’m doing much better

What are the common side affects from using this product?

I was told that PB8 would solve my heartburn problems, is this true?
Thank you

I guess it would depend on the person. I started taking this strand of them 38 days ago and I have constant belching and feeling sick after I eat anything and I think the constant burping is causing slight heartburn too. I never had a problem before. I started taking it due to sinus issues which now are better but I am dealing with this other issue sad

How can we drink PB8 how many pills a day ?