Daily gut routine
Envitamin Slimbiosys Ultra Probiotic
A once-a-day two-capsule blend of 13 probiotic species and 15 digestive enzymes, marketed for gut balance and weight support.
- Format
- Capsule, once a day
- Type
- Probiotic and digestive enzyme
- Cost
- $1.00 a day
- Customer rating
- 4 out of 5 from 1,983 ratings from Amazon
What customers consistently report
- Less bloating within a couple of weeks
- Easier, more regular bowel movements
- Lower appetite for some
Those are the themes that recur across the reviews. Low review confidence — the 4.9 from 1,744 reviews sits in a widget on the brand’s own site where 1,270 of the reviews are dated within about nine weeks of launch in late 2022 and all are four or five stars; Amazon shows 4.0 from 1,983 ratings with its text behind a sign-in; and no Trustpilot or Better Business Bureau profile was found.
Why it might work
The label combines live organisms with digestive enzymes: amylase, protease, lipase and lactase act on starch, protein, fat and lactose in food, and alpha-galactosidase acts on the sugars in beans and vegetables. The probiotic species listed are common Lactobacillus and Bifidobacterium species plus Saccharomyces boulardii, a yeast. How such a blend would affect weight is not described on the label, and the only weight wording is a “Unique Weight Support Formula” line with an unexplained footnote. Probiotic effects are strain-specific, so a species list without codes does not let you check whether any organism matches a studied strain. The enzyme amounts are given in activity units that differ by enzyme, so they cannot be compared across brands from the label alone.
What the research supports
No trial of this product was found, and none of its 13 organisms carries a strain designation, so strain-level trials cannot be matched to it. The strains behind the weight trials the brand’s marketing echoes are not on the label: L. gasseri BNR17 lowered visceral fat at 10 billion CFU a day in a 90-person, 12-week trial, and B. lactis B420 showed an effect on body fat only in a per-protocol group of a 225-person, six-month trial, while this label has 3 billion CFU in total. Pooled trials of probiotics for weight in overweight adults find changes of about half a kilogram, and a 2026 review of ten trials found no significant difference in body weight.
What the label discloses
The 13 species are listed as one proprietary blend of 3 billion CFU (30 mg) with no per-organism count and no count through expiry, alongside 15 enzymes with stated activity units. The brand states third-party testing and a GMP facility but names no laboratory and shows no certificate. The bottle says Pre+Probiotics but the panel lists no prebiotic ingredient, and the capsule and other ingredients are not listed.
Who this tends to suit
We match this product to people reporting bloating and general abdominal discomfort. It fits someone whose priority is day-to-day comfort or a steady daily routine. Whether it is the best fit for you depends on the rest of your answers — what you have already tried, what format you will take, and anything that has to be ruled out.
Where it may not fit
The label supports gluten-free. We flag this product for anyone pregnant or breastfeeding or taking prescription medication, and the quiz removes it rather than recommending it in those cases. That is a caution about who should be deciding, not a claim about the product. A capsule only works if you will take it once a day, every day.
Side effects and what to be aware of
Reviewers on the brand’s site and Amazon who report side effects mention gas, stomach pain and nausea, and a recurring group says they did not notice any change. The label’s own warnings list a long set of possible reactions, say pregnant or nursing mothers, under-18s and anyone with a medical condition should consult a physician, and name GERD, IBS, stomach ulcers and asthma as conditions it may adversely affect. Several 2026 reviews say the buyer did not know they were subscribed, and the 90-day guarantee applies to a first order only.
Common questions
Does Slimbiosys work for weight loss?
No trial of Slimbiosys was found. The label has no strain codes and no weight-linked strain such as L. gasseri BNR17 or B. lactis B420, and 3 billion CFU in total is below the 10 billion CFU a day used in the high-dose arms of the trials of those strains. Pooled trials of probiotics in overweight adults find about half a kilogram of weight difference at most, and some reviewers report reduced appetite or weight loss while others report no change.
What are the Slimbiosys side effects?
The label lists possible temporary reactions including gas, upset stomach, cramps, bloating, constipation, nausea, diarrhea, headaches and rash, and says pregnant or nursing mothers, under-18s and people with a medical condition should ask a physician. Reviewers who report problems mention gas, stomach pain and nausea; Amazon’s review summary says experiences with side effects are mixed.
How much does Slimbiosys cost?
One 60-capsule bottle is $29.99 on envitamin.com and $29.97 on Amazon, which is $1.00 a day at the label serving of two capsules. The three-pack is $84.99 ($0.94 a day) and the five-pack $134.99 ($0.90 a day). Subscribing takes 20% off the first order ($23.99 for one bottle), and the plan data suggests later deliveries price at the standard rate.
Who makes Slimbiosys, and how do I cancel the subscription?
The brand is a small Shopify and Amazon seller with no published company name, address or phone number. Several reviews from June to September 2026 say the buyer did not know they were subscribed; the subscribe box is unticked on the page, cancellation is by account or by email to the brand’s support address, and the 90-day guarantee applies to a first order only, so renewals are not refundable under the written policy.
Slimbiosys vs a probiotic with a named weight strain: what is different?
Slimbiosys lists 13 species and 15 enzymes with no strain codes and no prebiotic. A product that names a strain with a weight trial, such as L. gasseri BNR17 at 10 billion CFU a day or B. lactis B420, matches a trial’s organism and dose, which this label cannot do.
Before you take this. Speak to a doctor or pharmacist first if you are pregnant or breastfeeding, or taking prescription medication. Nothing on this page is medical advice, and no supplement diagnoses, treats, cures or prevents disease.
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Others we researched for the same job
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Related reading
Background on how this type of product works, read from the trial evidence.