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Dietary supplement

Ultimate Flora Probiotic 6 Billion Ingredients & Drug Interactions

by Renew Life

Ultimate Flora Probiotic 6 Billion label
See full label image
Capsule Category: Non-nutrient/non-botanical
Most serious interaction: Minor
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Ultimate Flora Probiotic 6 Billion against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Minor

Ultimate Flora Probiotic 6 Billion is a dietary supplement by Renew Life with 1 active ingredient. Its ingredients are commonly taken for acute diarrhea, antibiotic-associated diarrhea, traveler's diarrhea.Based on those ingredients, 40 medications have a known interaction with it, the most serious rated minor. The ingredients most likely to interact are Saccharomyces boulardii. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Ultimate Flora Probiotic 6 Billion by Renew Life

Ask about any prescription or over-the-counter medication and we check it for interactions with Ultimate Flora Probiotic 6 Billion by Renew Life — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Ultimate Flora Probiotic 6 Billion by Renew Life

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 11, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains one active ingredient: Saccharomyces boulardii, a beneficial yeast strain used as a probiotic. The capsule itself is made from vegetable material.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Moderate

Some clinical evidence supports this product's ingredients for its stated purpose, but it isn't conclusive.

Why this rating?
  • The label markets this product for: digestive wellness and healthy gut balance.
  • We looked for evidence on: Antibiotic-associated diarrhea, Travelers' diarrhea, Clostridioides difficile infection, Irritable bowel syndrome (IBS), Crohn disease, Ulcerative colitis — and 4 related terms.
  • The strongest evidence on file: Saccharomyces Boulardii is rated "Possibly Effective" for Antibiotic-associated diarrhea (Natural Medicines).
  • Also on file: Saccharomyces Boulardii is rated "Possibly Effective" for Rotaviral diarrhea, Travelers' diarrhea, Clostridioides difficile infection.
  • Also on file: Saccharomyces Boulardii is rated "Insufficient Reliable Evidence To Rate" for Constipation, Crohn disease, Ulcerative colitis.

Saccharomyces boulardii is rated Possibly Effective for six conditions: rotaviral diarrhea (watery diarrhea from rotavirus), travelers' diarrhea, diarrhea brought on by antibiotics, necrotizing enterocolitis (NEC, a serious intestinal condition in newborns), Clostridioides difficile infection (a tough gut bacterial infection), and Helicobacter pylori (a stomach bacterium linked to ulcers). The word 'possibly' means the evidence supports its use but isn't definitive — it's worth trying for these conditions, but results vary.

The evidence, ingredient by ingredient Saccharomyces Boulardii

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Saccharomyces boulardii is generally well tolerated in healthy adults, but the product should not be used by people who are critically ill or immunocompromised because of a rare but serious risk: the yeast can cause a bloodstream infection (fungemia). This risk is highest in intensive care settings, particularly in patients with central lines, feeding tubes, or on broad-spectrum antibiotics.

On the milder end, a small number of people have reported gastrointestinal complaints like abdominal cramps, bloating, nausea, vomiting, or decreased appetite. The safety data overall is limited, so speak with your doctor before use.

Side effects, ingredient by ingredient Saccharomyces Boulardii

Meds to double-check

Minor interactions only
Known Interaction Concern · database check
Minor only

Only Minor-severity interactions are documented for these ingredients.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Saccharomyces Boulardii.
  • The most serious interaction on file is rated Minor.
  • For scale: 40 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

If you take antifungals (drugs that kill fungi), double-check the timing with your pharmacist before starting this probiotic, because taking them together might reduce how well the yeast supplement works. Additionally, if you're critically ill, have a weakened immune system, or are in an intensive care setting, talk with your doctor first — this product isn't appropriate in those situations.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Only minor medication interactions are documented, and safety information is well characterized.

If you're looking to manage travelers' diarrhea, antibiotic-related diarrhea, or similar conditions and you're generally healthy, this probiotic is worth discussing with your pharmacist. Avoid it entirely if you're critically ill, immunocompromised, or hospitalized.

Check your exact medications — especially antifungals — before you start.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Jul 25, 2018.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Ultimate Flora Probiotic 6 Billion, straight from the product label.

Brand Renew Life
Barcode (UPC) 631257154170
Net contents 20 Vegetable Capsule(s)
Market status On market
Date entered into DSLD Jul 25, 2018
DSLD ID 178587
Product type Non-nutrient/non-botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free, Dairy Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Ultimate Flora Probiotic 6 Billion by Renew Life, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
Servings per container
20
UPC/BARCODE
631257154170
IngredientAmount% DV
Saccharomyces boulardii500 mg--

Other ingredients: Vegetable Capsule

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
General Statements

Good for your gut! Your gut is your engine, your digestive core.

Survives stomach acid Travel-friendly to help promote healthy digestive balance No refrigeration required

Digestive wellness, naturally

For nearly two decades, we have pioneered superior-quality digestive care supplements to help people achieve optimal health from the inside out.

Actual size capsule

6 billion live cultures guaranteed

500 mg per capsule

Helps balance compromised intestinal flora Clinically studied strain for relief of occasional diarrhea

Quality, purity, and potency guaranteed through expiration.

Manufactured in USA in a GMP facility.

Brand IP Statement(s)

Keep it running smoothly with Ultimate Flora Probiotics.

At Renew Life, we believe a healthy gut is a happy gut.

Live digestively.

Formula

Saccharomyces boulardii Ultimate Flora Saccharomyces boulardii helps you feel better by helping to rebalance your intestinal flora after it’s been compromised. Plus, our gut-friendly strain has been clinically shown to help alleviate occasional diarrhea.

Formulation

Dairy and gluten free No artificial ingredients or colors

Gluten free Soy free Dairy free No artificial ingredients

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

FDA Statement of Identity

Probiotic Supplement

General

#15417 020716 65396B

Suggested/Recommended/Usage/Directions

Directions: Take 1 capsule daily with or without food.

Storage

Store at 77(0)F (25(0)C) or below.

Precautions

Keep out of reach of children.

Consult your healthcare professional before using this or any product if you are pregnant, nursing, or under medical supervision.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Ultimate Flora Probiotic 6 Billion by Renew Life label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Ultimate Flora Probiotic 6 Billion label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Ultimate Flora Probiotic 6 Billion by Renew Life

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container20 Amounts shown are per serving.

Saccharomyces boulardii

Interacts with
40 drugs
500 mg per serving

Saccharomyces boulardii is a beneficial yeast used as a probiotic, with the strongest evidence for preventing and treating certain types of diarrhea,...

Saccharomyces boulardii monograph & interactions

Other (inactive) ingredients: Vegetable Capsule. These complete the product’s ingredient list but are not active constituents.

Interaction report

Ultimate Flora Probiotic 6 Billion by Renew Life Drug Interactions

Want to check YOUR meds against Ultimate Flora Probiotic 6 Billion?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
40Drugs
40 Minor

Ingredients driving the most interactions

Saccharomyces boulardii 40

Individual Drug Interactions

The ingredients in Ultimate Flora Probiotic 6 Billion interact with 40 drugs. Click any drug to see the details.

1 of the 1 ingredient in Ultimate Flora Probiotic 6 Billion interact with drugs. Each result below shows which ingredient is responsible. Saccharomyces boulardii

Each ingredient & the kinds of drugs it affects

For each ingredient in Ultimate Flora Probiotic 6 Billion with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Saccharomyces boulardii1 drug type · 40 drugs

Antifungals

Theoretically, taking antifungals with Saccharomyces boulardii might decrease the effectiveness of Saccharomyces boulardii.
S. boulardii is a live yeast. Therefore, simultaneously taking antifungals might kill a significant number of the organisms.

Likelihood Possible Evidence D
Saccharomyces boulardii full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Ultimate Flora Probiotic 6 Billion, from the product label.

Renew Life

Name
Renew Life Formulas
City
Palm Harbor
State
FL
ZipCode
34683
Phone Number
1-800-830-1800
Web Address
www.ultimateflora.com
Pharmacist Counseling Corner

Ultimate Flora Probiotic 6 Billion by Renew Life: Common Questions

Does Ultimate Flora Probiotic 6 Billion by Renew Life interact with any medications?
Yes. Based on its ingredients, Ultimate Flora Probiotic 6 Billion has a known interaction with 40 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Ultimate Flora Probiotic 6 Billion contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take this if I'm on an antifungal medication?
You can, but there's a timing concern. Antifungals kill fungi, so taking them at the same time as Saccharomyces boulardii might reduce how well the probiotic works. Check with your pharmacist about spacing them out or adjusting when you take each one.
Is this safe if I'm in the hospital or very sick?
No. If you're critically ill or have a weakened immune system, avoid this product. In rare cases, the yeast has caused serious bloodstream infections in hospitalized patients, especially those on feeding tubes or broad-spectrum antibiotics. Talk with your doctor if you're considering it.
What does this probiotic actually do?
Saccharomyces boulardii is rated Possibly Effective for several types of diarrhea — travelers' diarrhea, antibiotic-related diarrhea, rotaviral diarrhea — and for certain gut infections like Clostridioides difficile and Helicobacter pylori. 'Possibly' means the evidence supports it, but results vary from person to person.
What side effects might I notice?
Most people tolerate it well. Rarely, some people report mild gastrointestinal complaints — abdominal cramps, bloating, nausea, vomiting, or a decrease in appetite. If you have concerns, speak with your pharmacist.
Is it safe to use during pregnancy or breastfeeding?
The safety data for pregnancy and lactation isn't available in the product information. Talk with your doctor or pharmacist before taking this during pregnancy or while breastfeeding — they can give you personalized advice.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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Ask a pharmacist

Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Ultimate Flora Probiotic 6 Billion label
Go deeper

The Full Monographs Behind Ultimate Flora Probiotic 6 Billion’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Saccharomyces Boulardii

Interacts with 40 drugs

Saccharomyces boulardii is a beneficial yeast used as a probiotic, with the strongest evidence for preventing and treating certain types of diarrhea, including antibiotic-associated diarrhea...

Read the full Saccharomyces Boulardii monograph →
Sources

Sources & How We Checked

Ultimate Flora Probiotic 6 Billion's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 26 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Saccharomyces Boulardii 26 references
  1. Niault M, Thomas F, Prost J, et al. Fungemia due to Saccharomyces species in a patient treated with enteral Saccharomyces boulardii. Clin Infect Dis 1999;28:930.
  2. Pletinex M, Legein J, Vandenplas Y. Fungemia with Saccharomyces boulardii in a 1-year-old girl with protracted diarrhea. J Pediatr Gastroenterol Nutr 1995;21:113-5. DOI
  3. Fredenucci I, Chomarat M, Boucaud C, et al. Saccharomyces boulardii fungemia in a patient receiving ultra-levure therapy. Clin Infect Dis 1998;27:222-3.
  4. Elmer GW, McFarland LV, Surawicz CM, et al. Behaviour of Saccharomyces boulardii in recurrent Clostridium difficile disease patients. Aliment Pharmacol Ther 1999;13:1663-8.
  5. Lewis SJ, Freedman AR. Review article: the use of biotherapeutic agents in the prevention and treatment of gastrointestinal disease. Aliment Pharmacol Ther 1998;12:807-22. PubMed
  6. Cesaro S, Chinello P, Rossi L, Zanesco L. Saccharomyces cerevisiae fungemia in a neutropenic patient treated with Saccharomyces boulardii. Support Care Cancer 2000;8:504-5. PubMed
  7. Hennequin C, Thierry A, Richard GF, et al. Microsatellite typing as a new tool for identification of Saccharomyces cerevisiae strains. J Clin Microbiol 2001;39:551-9.
  8. Plein K, Hotz J. Therapeutic effects of Saccharomyces boulardii on mild residual symptoms in a stable phase of Crohn's disease with special respect to chronic diarrhea - a pilot study. Z Gastroenterol 1993;31:129-34.
  9. Borriello SP, Hammes WP, Holzapfel W, et al. Safety of probiotics that contain lactobacilli or bifidobacteria. Clin Infect Dis 2003;36:775-80. PubMed
  10. Marteau P, Seksik P. Tolerance of probiotics and prebiotics. J Clin Gastroenterol 2004;38:S67-9. PubMed
  11. Munoz P, Bouza E, Cuenca-Estrella M, et al. Saccharomyces cerevisiae fungemia: an emerging infectious disease. Clin Infect Dis 2005;40:1625-34. PubMed
  12. Lherm, T., Monet, C., Nougiere, B., Soulier, M., Larbi, D., Le Gall, C., Caen, D., and Malbrunot, C. Seven cases of fungemia with Saccharomyces boulardii in critically ill patients. Intensive Care Med 2002;28(6):797-801. PubMed
  13. Riquelme, A. J., Calvo, M. A., Guzman, A. M., Depix, M. S., Garcia, P., Perez, C., Arrese, M., and Labarca, J. A. Saccharomyces cerevisiae fungemia after Saccharomyces boulardii treatment in immunocompromised patients. J Clin.Gastroenterol. 2003;36(1):41- PubMed
  14. Cherifi, S., Robberecht, J., and Miendje, Y. Saccharomyces cerevisiae fungemia in an elderly patient with Clostridium difficile colitis. Acta Clin Belg. 2004;59(4):223-224. PubMed
  15. Ellouze O, Berthoud V, Mervant M, Parthiot JP, Girard C. Septic shock due to Sacccaromyces boulardii. Med Mal Infect. 2016;46(2):104-105.
  16. Appel-da-Silva MC, Narvaez GA, Perez LRR, Drehmer L, Lewgoy J. Saccharomyces cerevisiae var. boulardii fungemia following probiotic treatment. Med Mycol Case Rep. 2017;18:15-7. PubMed
  17. Atici S, Soysal A, Karadeniz Cerit K, et al. Catheter-related Saccharomyces cerevisiae Fungemia Following Saccharomyces boulardii Probiotic Treatment: In a child in intensive care unit and review of the literature. Med Mycol Case Rep. 2017;15:33-35. PubMed
  18. Martin IW, Tonner R, Trivedi J, et al. Saccharomyces boulardii probiotic-associated fungemia: questioning the safety of this preventive probiotic's use. Diagn Microbiol Infect Dis. 2017;87(3):286-8. PubMed
  19. Romanio MR, Coraine LA, Maielo VP, Abramczyc ML, Souza RL, Oliveira NF. Saccharomyces cerevisiae fungemia in a pediatric patient after treatment with probiotics. Rev Paul Pediatr 2017;35(3):361-4.
  20. Roy U, Jessani LG, Rudramurthy SM, et al. Seven cases of Saccharomyces fungaemia related to use of probiotics. Mycoses 2017;60(6):375-380.
  21. Romanio MR, Coraine LA, Maielo VP, Abramczyc ML, Souza RL, Oliveira NF. Saccharomyces cerevisiae fungemia in a pediatric patient after treatment with probiotics. Rev Paul Pediatr. 2017 Jul-Sep;35(3):361-364. doi: 10.1590/1984-0462/;2017;35;3;00014.
  22. Flatley EA, Wilde AM, Nailor MD. Saccharomyces boulardii for the prevention of hospital onset Clostridium difficile infection. J Gastrointestin Liver Dis. 2015;24(1):21-4. PubMed
  23. Ventoulis I, Sarmourli T, Amoiridou P, et al. Bloodstream infection by Saccharomyces cerevisiae in two COVID-19 patients after receiving supplementation of Saccharomyces in the ICU. J Fungi (Basel). 2020;6(3):98. PubMed
  24. Wombwell E, Bransteitter B, Gillen LR. Incidence of Saccharomyces cerevisiae fungemia in hospitalised patients administered Saccharomyces boulardii probiotic. Mycoses 2021;64(12):1521-1526.
  25. Rannikko J, Holmberg V, Karppelin M, et al. Fungemia and Other Fungal Infections Associated with Use of Saccharomyces boulardii Probiotic Supplements. Emerg Infect Dis 2021;27(8):2090-6.
  26. Awoyemi A, Mayerhofer C, Felix AS, et al. Rifaximin or Saccharomyces boulardii in heart failure with reduced ejection fraction: Results from the randomized GutHeart trial. EBioMedicine 2021;70:103511. PubMed

See these in context on the Saccharomyces Boulardii monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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