WellnessVerge is reader-supported. We may earn a commission when you make a purchase through the links on this page. Learn more about our process here.

Why You Can Trust Us
Every article and review on WellnessVerge is thoroughly researched and fact-checked by licensed health professionals. Our editorial team is made up of registered dietitians and medical doctors.
Every piece of content is also medically reviewed to ensure accuracy and alignment with sound scientific evidence and medical consensus. We only use peer-reviewed journals and reputable medical sources to form our conclusions and recommendations.
We operate with total editorial independence, and our editorial policies ensure that your well-being comes first. Based on our rigorous research, we only recommend products that are worth considering. We always disclose any ads or partnerships with brands featured on our site.
To learn more, visit our Editorial Policy page.

ProbioSlim Review: Pros & Cons, Effectiveness, Safety

By Melissa Mitri, MS, RD

Last Updated on June 11, 2022

Medically Reviewed by Anthony Dugarte, MD

Dietitian Rating:


About This Rating
The average rating of this product is calculated based on the evaluation of the following factors:
  • Support for Claims:3.0
  • Ingredient Safety:3.0
  • Value for the Price:4.0
  • Brand Transparency:4.0

ProbioSlim is a dietary supplement intended to ease digestive symptoms and support weight loss. Due to its probiotic content, this supplement may help improve your digestive health. However, this supplement is not perfect.

Written by
Melissa Mitri, MS, RD
Registered Dietitian Nutritionist
Melissa Mitri, MS, RD, is a registered dietitian nutritionist, weight loss specialist, and expert health writer with over 15 years of experience in the health and wellness industry. Melissa has worked in a variety of healthcare settings helping clients improve their diet through an individualized approach.
Medically Reviewed by
Anthony Dugarte, MD
Medical Reviewer
Anthony Dugarte, M.D., C.S.C.S. is a health and wellness writer and medical content reviewer. In addition to dedicating the last 11 years to medical research, Dr. Dugarte also has more than a decade of experience in strength and conditioning, nutrition, and rehabilitative exercise, as well as authoring and reviewing health and wellness-related content.
ProbioSlim Review: Pros & Cons, Effectiveness, Safety
Photo by WellnessVerge


  • Some ingredients are evidence-based
  • Provides antioxidants and beneficial fibers
  • Price is reasonable for a 30-day supply


  • Limited evidence for weight loss claims
  • Limited evidence for probiotic strain effectiveness
  • Potential safety concerns

What Is ProbioSlim?

ProbioSlim from Force Factor is a dietary supplement designed to help promote healthy digestion, replenish good bacteria, and support weight loss.

Additional claims are that the main compound present, called LactoSpore, can ease symptoms associated with occasional diarrhea, constipation, gas, and bloating.

ForceFactor promotes ProbioSlim as unique since it contains Bacillus coagulans, which can survive the harsh environment in the stomach and as a result, may improve absorption.

To use ProbioSlim, take 2 capsules per day – 1 with breakfast and 1 with lunch.

This supplement contains both probiotic and prebiotic ingredients as well as weight loss aids. Probiotics and prebiotics work together but are not the same.

Probiotics are live bacteria that help support our health. The more live, “good” probiotic bacteria we have, in theory, the more it helps reduce the bad types of bacteria.

Prebiotics are a type of fiber that feeds the probiotic bacteria and helps them grow.

Buy ProbioSlim on Amazon

Evaluation of ProbioSlim’s Ingredients

The four core ingredients in ProbioSlim are part of a complex called the Whole Health Superblend. This complex contains a total dose of 541 milligrams.

In taking a closer look at the evidence, here is a summary of what I’ve found on the health claims:

LactoSpore (Probiotic)

LactoSpore Bacillus coagulans is the probiotic strain present in this ProbioSlim. Probiotics are thought to support digestive health, one of the claims of this product. (1)

The manufacturer claims that the specific strain LactoSpore is well absorbed because it is designed to survive the high acidity in your stomach.

Bacillus bacteria are present naturally in our intestinal tract.

Studies showed some evidence that Bacillus coagulans may reduce diarrhea in those with irritable bowel syndrome (IBS) as well as provide other benefits in IBS patients. (2, 3)

Regarding weight loss, there are no specific studies done on Bacillus coagulans

There is some research suggesting that probiotics may help with weight loss.

This ingredient is also under the category of Generally Recognized As Safe (GRAS). To achieve GRAS status, an ingredient is thoroughly evaluated by qualified experts and deemed safe when used as intended. (4)

While this ingredient shows promise in improving IBS symptoms, the research is limited regarding its support with digestion in the general population.

Additionally, there is no data supporting this ingredient for weight loss.

Super EGCG Green Tea Leaf Extract

EGCG, or epigallocatechin gallate, is an antioxidant present naturally in green tea.

EGCG has been studied for its potential role in fat metabolism and weight loss. However, the quality of the data to prove this has been mixed.

For example, a 2014 research review showed promise in EGCG’s anti-obesity effects. (5)

Alternatively, another 2013 review showed varying results in its role in fat metabolism and fat-burning potential. (6)

EGCG may support weight loss and metabolism, but more research is needed to determine the proper dose needed and its long-term effects.

It is also unclear how much EGCG is present in ProbioSlim, as it is part of a complex.


Caffeine, in moderation, has antioxidant properties and may support a healthy metabolism.

A systematic review and meta-analysis were done to investigate caffeine’s role in weight loss. (7)

This study demonstrated that regular caffeine intake might promote a lower weight, BMI, and body fat reduction.

This effect was also dose-dependent, meaning the more caffeine consumed, the greater the likelihood of weight loss.

Another large study showed that those consuming more caffeinated beverages were also able to maintain weight loss better. (8)

While caffeine may have some weight-loss benefits, everyone has a different tolerance to caffeine’s effects.

Probioslim Capsules
Probioslim capsules. Photo by WellnessVerge

Prebiotic Fruit Extracts

Prebiotic Fruit Extracts are present in Probioslim. Prebiotics are plant fibers that help feed the beneficial bacteria (probiotics) in your gut.

Some research has shown consuming prebiotics can support digestive health, especially when various types are consumed. (9)

ProbioSlim contains 3 prebiotic fruit extracts – kiwi, fig, and papaya.

A comprehensive research review also found that taking a synbiotic supplement that contains both probiotics and prebiotics may support weight loss. (10)

However, this was the case with supplements containing Lactobacillus strains, not Bacillus strains like ProbioSlim.

Additionally, any of these prebiotics can also be found in adequate amounts through your diet.

Consuming them in your diet may produce a greater benefit, as they are combined with other beneficial nutrients in that food.

The research is stronger regarding prebiotics and digestive health rather than weight loss.

It does have the potential to support weight loss as well, but more research is needed on the dosage and variety of sources.

Support for Claimed Benefits

Below is our summary of the available evidence for the claimed benefits of ProbioSlim based on the available research:

Promotes healthy digestion3/5
Replenishes good bacteria3/5
Supports weight loss3/5

Side Effects and Safety

ProbioSlim contains probiotics, which are generally recognized as safe. However, some people experience mild side effects, according to a 2010 research review. (11)

For example, some experience gas, bloating, or diarrhea, especially when first taking probiotics. This often decreased after the first week or so after taking it.

Additionally, those who are immunocompromised may be at an increased risk of infection when taking probiotics. (11)

ProbioSlim is also a stimulant-containing supplement as it contains caffeine.

The caffeine amount is also in unknown quantities as part of a complex. For those who are caffeine-sensitive, it is unclear how they may react. Therefore, it's important to speak to your doctor before beginning ProbioSlim if you fall into that category.

According to the FDA, The upper limit for caffeine intake for the general population is 400 mg per day. (12)

The FDA also warns against consuming more than 1,200 mg of caffeine per day, as this could cause more serious side effects such as seizures.

A 2017 research review found that moderate caffeine consumption is relatively safe. (13)

If you are also consuming caffeinated beverages such as coffee, tea, or soda in addition to this supplement, it may bring you to an unsafe range.

Always consult with your medical provider before starting this or any supplement, especially if you are caffeine-sensitive.

ProbioSlim Cost and Buying Options

Probioslim 60-count costs $19.88 both at Walmart and Amazon. However, Walmart does offer a convenient 90-day return window if you are not satisfied with the product.

The supplement is also sold at GNC but for double the price.

For the best deal, you can purchase 120 capsules of ProbioSlim for $29.88 at Sam's Club, if you have their membership.

Force Factor does not sell ProbioSlim directly on its website.

Shop ProbioSlim on Amazon

Popular Alternatives To ProbioSlim

There are many probiotic and prebiotic supplements available on the market. The most extensively studied probiotic strains are Lactobacillus and Bifidobacterium, which ProbioSlim does not contain, unfortunately.

If your main purpose for taking a probiotic supplement is to improve digestion, consider a product containing Lactobacillus or Bifidobacterium.

Below are some additional popular probiotic alternatives from reputable brands that contain either one of these strains as well as other research-based ingredients.

Seed Probiotic
Dietitian Rating
Align Probiotic
Dietitian Rating
Multi-GI 5
Dietitian Rating
Dietitian Rating

The Bottom Line

ProbioSlim contains studied ingredients demonstrating that it may help with your digestive symptoms.

Additionally, some of the ingredients have moderate research suggesting they may help with weight loss and metabolism, although it may not be sustainable in the long term.

The supplement is reasonably priced compared to its competitors. ProbioSlim may be worth trying.

However, keep in mind that if you are sensitive to caffeine or at risk for cardiovascular disease, consult with your medical provider before starting ProbioSlim or any new supplement regimen.

Consider This for Your Digestive Health As Well

As a registered dietitian, I would suggest first getting your probiotics from fermented foods like yogurt, kimchi, or kombucha.

I would also encourage a diet rich in prebiotic fibers with a variety of fruits and vegetables for optimal digestion.

If you experience digestive concerns and are also trying to lose weight, identifying the underlying cause of your health issues would be the first step.

I would recommend adopting a healthy diet and exercise regimen as a first-step approach to losing weight.

I would suggest working with a health professional such as a doctor or registered dietitian and then identifying if a supplement is needed.

Get Started with Seed Probiotic
Seed uses evidence-based ingredients that help support your gastrointestinal function, skin health, heart health, gut immune function, gut barrier integrity, and micronutrient synthesis.
Use our code WELLNESSVERGE for 15% off your first month's supply of Seed's DS-01™ Daily Synbiotic
30 day risk-free guarantee
Free shipping within the US
Was This Article Helpful?YesNo
Thanks for your feedback!
In a few words, please tell us how this article helped you today.
Please let us know how we can improve this article by selecting your concern below.
Thank You! We appreciate your feedback.
* Please select at least one topic:
Please Note: We cannot provide medical advice. This feedback will help us continue improving your user experience on WellnessVerge.
Please Note: We cannot provide medical advice. This feedback will help us continue improving your user experience on WellnessVerge.
Submit Feedback
Submit Feedback

At WellnessVerge, we only use reputable sources, including peer-reviewed medical journals and well-respected academic institutions.

  1. Probiotics: What You Need To Know:
  2. Bacillus coagulans MTCC 5856 supplementation in the management of diarrhea predominant Irritable Bowel Syndrome: a double blind randomized placebo controlled pilot clinical study:
  3. The efficacy of a synbiotic containing Bacillus Coagulans in treatment of irritable bowel syndrome: a randomized placebo-controlled trial:
  4. USFDA GRAS Notification:
  5. The anti-obesity effects of green tea in human intervention and basic molecular studies:
  6. The Effect of Green Tea Extract on Fat Oxidation at Rest and during Exercise: Evidence of Efficacy and Proposed Mechanisms:
  7. The effects of caffeine intake on weight loss: a systematic review and dos-response meta-analysis of randomized controlled trials:
  8. Caffeine intake is related to successful weight loss maintenance:
  9. Health Effects and Sources of Prebiotic Dietary Fiber:
  10. Changes seen in gut bacteria content and distribution with obesity: causation or association?:
  11. Probiotics:
  12. Spilling the Beans: How Much Caffeine is Too Much?:
  13. The Safety of Ingested Caffeine: A Comprehensive Review: