Interactions on record — worth a quick check against your medications. Based on 3 of 5 ingredients. Check your meds →
Dietary supplement

Probiotic Ingredients & Drug Interactions

by youtheory

Powder Category: Other Combinations
Most serious interaction: Moderate
The interaction bottom line Most serious interaction: Moderate

Probiotic is a dietary supplement by youtheory with 5 active ingredients. Its ingredients are commonly taken for constipation, irritable bowel syndrome (ibs), diarrhea.Based on those ingredients, 182 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Bacillus coagulans MTCC-5856, Bacillus subtilis (MTCC 5981). Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

HelloPharmacist Scorecard of Probiotic by youtheory

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

What’s inside

Low disclosure
Ingredient Transparency · database check
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 2 of its 5 active ingredients.
  • “Proprietary Probiotic Blend” is a proprietary blend — the label doesn't break down how much of each component you get.

youtheory Probiotic Powder contains five active ingredients: a proprietary blend of probiotics (beneficial bacteria), plus fructooligosaccharides and xylo-oligosaccharides (both prebiotics — fibers that feed friendly bacteria), and two additional Bacillus strains. The two named probiotics are Bacillus coagulans and Bacillus subtilis, both live organisms designed to support digestive health.

The product also includes inactive ingredients (maltodextrin and silicon dioxide) as fillers and flow agents.

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

This product doesn't appear to be marketed for a specific use, so we graded its ingredients' overall clinical evidence instead.

Moderate

Some clinical evidence supports its ingredients for:

Why this rating?
  • The label markets general wellness (“Supports digestive health”), not a specific health condition, so there is no single claim to grade against clinical-evidence data.
  • Since the label doesn't commit to one use, we graded the ingredients' overall clinical evidence instead.
  • On file: Constipation — rated "Possibly Effective" (Bacillus Coagulans) (Natural Medicines).
  • On file: Irritable bowel syndrome (IBS) — rated "Possibly Effective" (Bacillus Coagulans) (Natural Medicines).
  • On file: Antibiotic-associated diarrhea — rated "Possibly Effective" (Bacillus Subtilis) (Natural Medicines).

Bacillus coagulans is rated possibly effective for constipation and irritable bowel syndrome (IBS). Bacillus subtilis is rated possibly effective for antibiotic-associated diarrhea.

For constipation with B. subtilis, and for other claimed uses like athletic performance, cancer, or fatty liver disease, the evidence isn't established in our data. Fructooligosaccharides show insufficient evidence for osteoporosis, constipation, diabetes, travelers' diarrhea, and high cholesterol.

The effectiveness of Xylo-oligosaccharides and Bacillus clausii isn't rated in the data we hold.

The evidence, ingredient by ingredient Bacillus Coagulans Bacillus Subtilis Fructo-oligosaccharides (fos)

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 3 of the 3 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 3 of 3.
  • General safety write-ups exist for 3 of 3.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Fructooligosaccharides are generally well tolerated at food levels but can cause gas, bloating, and abdominal pain, especially at higher doses. A meta-analysis of clinical trials found no increase in these side effects at doses up to 15 grams daily compared to placebo.

Bacillus coagulans and Bacillus subtilis are generally well tolerated in healthy adults, but safety data is limited and quality varies by product. Rare cases of infection (bacteremia, meningitis) have been reported in severely ill or immunocompromised patients taking live Bacillus preparations.

One headache and rare cases of diarrhea were reported in trials. Pregnancy and lactation data is not on file for any ingredient — talk with your doctor about whether this product is right for you during pregnancy or while breastfeeding.

Side effects, ingredient by ingredient Bacillus Coagulans Bacillus Subtilis Fructo-oligosaccharides (fos)

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 2 of the 3 matched ingredients can interact with medications — Bacillus Coagulans, Bacillus Subtilis.
  • The most serious interaction on file is rated Moderate.
  • For scale: 182 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.

You must separate doses of this probiotic from any antibiotic drugs. Take them several hours apart, and ask your pharmacist for the best timing with your specific antibiotic.

This affects a large number of antibiotics (182 medications overall), so do not take them together.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

This probiotic may help with constipation and IBS if the Bacillus strains work for you, and B. subtilis might help with diarrhea after antibiotics. The biggest caution is antibiotic use — you'll need to space doses apart.

If you're healthy with a normal immune system, it's generally well tolerated, though some people notice gas or bloating. Check your exact medications and health history with your own doctor or pharmacist before starting.

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

Assessment coverage: 3 of 5 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Feb 22, 2024.

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 Probiotic, straight from the product label.

Brand youtheory
Barcode (UPC) 850502007485
Net contents 15 Powder Packet(s); 1.72 Ounce(s); 48.9 Gram(s)
Market status On market
Date entered into DSLD Feb 22, 2024
DSLD ID 305895
Product type Other Combinations
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Women (not pregnant or lactating)
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 Probiotic by youtheory, 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:
3.26 Gram(s)
Maximum serving Sizes:
3.26 Gram(s)
Servings per container
15
UPC/BARCODE
850502007485
IngredientAmount% DV
Proprietary Probiotic Blend0 NP--
Fructooligosaccharides1000 mg--
Bacillus coagulans MTCC-58560 NP--
Xylo-oligosaccharides1000 mg--
Bacillus clausii (MTCC 5980)0 NP--
Bacillus subtilis (MTCC 5981)0 NP--

Other ingredients: Maltodextrin, Silicon Dioxide

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.
Formula

Natural sweet flavor 6 Billion CFU

Our Proprietary Probiotic Blend contains three well-defined probiotic strains that have undergone genetic testing for identification. DNA-verification helps to guarantee the purity, potency and safety of this product. XOS prebiotics are supported by strong clinical publications and work at dramatically lower dose than most prebiotics...without the uncomfortable side effects. XOS has been shown to boost levels of beneficial bifidobacteria in the human gut.

With prebiotics: Food for beneficial bacteria

Formulation

Instant-mix

Supports digestive health

Promotes healthy gut flora Helps with occasional gas, bloating and abdominal discomfort Youtheory Probiotic Instant-Mix is a better way to replenish your body's microflora. The probiotic strains used in this formula can survive the harsh acidic environment in the stomach and make it to the digestive tract where they can successfully bring balance to gut bacteria.

General Statements

15 powder packets 0.11 oz (3.26g) each

FDA Statement of Identity

Dietary Supplement

Precautions

Usage warnings: Check with your doctor before using this product if you are taking medication or have any medical conditions. Do not use if you are pregnant or nursing.

Do not exceed the recommended daily intake.

Not intended for persons under 18. Keep out of reach of children.

This product is manufactured in a facility that processes whey milk protein and fish extracts.

Storage

Store in a cool and dry place after opening.

No refrigeration necessary.

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.

Suggested/Recommended/Usage/Directions

Suggested use: (Adults) mix one (1) packet with water, juice or tea. Stir vigorously. Drink.

See for yourself

Probiotic by youtheory label

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

What’s inside

The Ingredients in Probiotic by youtheory

These are the 5 active ingredients this product is made of. Select any to open its full monograph.

Serving size3.26 Gram(s) Dosage formPowder Servings per container15 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Proprietary Probiotic Blend

0 NP per serving

Fructooligosaccharides

No known
interactions
1000 mg per serving

Fructo-oligosaccharides (FOS) are a type of soluble fiber that acts as a prebiotic, meaning they feed the helpful bacteria in your gut. They are gener...

Fructooligosaccharides monograph & interactions

Xylo-oligosaccharides

1000 mg per serving

Other (inactive) ingredients: Maltodextrin, Silicon Dioxide. These complete the product’s ingredient list but are not active constituents.

Interaction report

Probiotic by youtheory Drug Interactions

Want to check YOUR meds against Probiotic?

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
182Drugs
182 Moderate

Ingredients driving the most interactions

Each ingredient & the kinds of drugs it affects

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

Bacillus coagulans MTCC-58561 drug type · 182 drugs

Antibiotic Drugs

Theoretically, taking antibiotics with Bacillus coagulans might decrease the effectiveness of B. coagulans.
B. coagulans preparations usually contain live and active organisms. Therefore, simultaneously taking antibiotics might kill a significant number of the organisms. Tell patients to separate administration of antibiotics and B. coagulans preparations by at least two hours.

Likelihood Probable Evidence D

Bacillus subtilis (MTCC 5981)1 drug type · 182 drugs

Antibiotic Drugs

Theoretically, taking Bacillus subtilis with antibiotic drugs might decrease the effectiveness of B. subtilis.
Since B. subtilis preparations usually contain live and active organisms, simultaneously taking antibiotics might kill a significant number of the organisms. Tell patients to separate administration of antibiotics and B. subtilis preparations by at least 2 hours.

Likelihood Probable Evidence D
The maker

Brand information

Manufacturer and brand details for Probiotic, from the product label.

youtheory

See all youtheory products
Name
Nutrawise
City
Irvine
State
CA
ZipCode
92618
Phone Number
1.888.271.8976
Web Address
youtheory.com
Pharmacist Counseling Corner

Probiotic by youtheory: Common Questions

Does Probiotic by youtheory interact with any medications?
Yes. Based on its ingredients, Probiotic has a known interaction with 182 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Probiotic contains 5 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is 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.
Will this probiotic work if I'm on antibiotics?
Not if you take them at the same time. Antibiotics can kill the live bacteria in this probiotic before they work. You'll need to space your antibiotic and probiotic doses several hours apart — your pharmacist can help you plan the timing.
What side effects should I expect?
The most common are gas, bloating, and abdominal pain from the prebiotic fibers, especially when you first start or at higher doses. Clinical trials found these weren't more common than placebo at standard doses. Rarely, headache or diarrhea has been reported.
Is it safe if I have a weak immune system?
The data shows live Bacillus can rarely cause serious infection in severely ill or immunocompromised patients. If you have a weakened immune system, central venous catheter, or serious illness, talk to your doctor before using this product.
Can I take this while pregnant or breastfeeding?
We don't have safety data on file for any ingredient during pregnancy or lactation. Talk with your doctor or pharmacist about whether this probiotic is right for you in these situations.
Does this actually help with constipation or IBS?
Bacillus coagulans is rated possibly effective for both constipation and IBS, meaning some evidence supports it but more research is needed. Results vary by person.

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

Not sure if Probiotic is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

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.

Probiotic label
Sources

Sources & How We Checked

Probiotic'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 36 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.

Fructo-oligosaccharides (fos) 6 references
  1. Briet F, et al. Symptomatic response to varying levels of fructo-oligosaccharides consumed occasionally or regularly. Eur J Clin Nutr 1995;49:501-7.
  2. Bouhnik Y, Vahedi K, Achour L, et al. Short-chain fructo-oligosaccharide administration dose-dependently increases fecal bifidobacteria in healthy humans. J Nutr 1999;129:113-6. PubMed
  3. Cummings JH, Macfarlane GT, Englyst HN. Prebiotic digestion and fermentation. Am J Clin Nutr 2001;73:415S-420S. PubMed
  4. Souza DDS, Tahan S, Weber TK, Araujo-Filho HB, de Morais MB. Randomized, double-blind, placebo-controlled parallel clinical trial assessing the effect of fructooligosaccharides in infants with constipation. Nutrients. 2018;10(11). pii: E1602. PubMed
  5. Andermann TM, Fouladi F, Tamburini FB, et al. A Fructo-Oligosaccharide Prebiotic Is Well Tolerated in Adults Undergoing Allogeneic Hematopoietic Stem Cell Transplantation: A Phase I Dose-Escalation Trial. Transplant Cell Ther 2021;27(11):932. PubMed
  6. Dou Y, Yu X, Luo Y, Chen B, Ma D, Zhu J. Effect of Fructooligosaccharides Supplementation on the Gut Microbiota in Human: A Systematic Review and Meta-Analysis. Nutrients 2022;14(16):3298. PubMed

See these in context on the Fructo-oligosaccharides (fos) monograph →

Bacillus Coagulans 20 references
  1. Saxelin M, Chuang NH, Chassy B, et al. Lactobacilli and bacteremia in southern Finland 1989-1992. Clin Infect Dis 1996;22:564-6. PubMed
  2. Tynkkynen S, Singh KV, Varmanen P. Vancomycin resistance factor of Lactobacillus rhamnosus GG in relation to enterococcal vancomycin resistance (van) genes. Int J Food Microbiol 1998;41:195-204. PubMed
  3. Klein G, Zill E, Schindler R, et al. Peritonitis associated with vancomycin-resistant Lactobacillus rhamnosus in a continuous ambulatory peritoneal dialysis patient; organism identification, antibiotic therapy, and case report. J Clin Microbiol 1998;36:
  4. Kalima P, Masterton RG, Roddie PH, et al. Lactobacillus rhamnosus infection in a child following bone marrow transplant. J Infect 1996;32:165-7. PubMed
  5. Goldin BR. Health Benefits of probiotics. Br J Nutr 1998;80:S203-7. DOI
  6. Rautio M, Jousimies-Somer H, Kauma H, et al. Liver abscess due to Lactobacillus rhamnosus strain indistinguishable from L. rhamnosus strain GG. Clin Infect Dis 1999;28:1159-60.
  7. MacGregor G, Smith AJ, Thakker B, Kinsella J. Yoghurt biotherapy: contraindicated in immunosuppressed patients? Postgrad Med J 2002;78:366-7. PubMed
  8. Land MH, Rouster-Stevens K, Woods CR, et al. Lactobacillus sepsis associated with probiotic therapy. Pediatrics 2005;115:178-81.
  9. De Groote MA, Frank DN, Dowell E, et al. Lactobacillus rhamnosus GG bacteremia associated with probiotic use in a child with short gut syndrome. Pediatr Infect Dis J 2005;24:278-80. PubMed
  10. Vahabnezhad E, Mochon AB, Wozniak LJ, Ziring DA. Lactobacillus bacteremia associated with probiotic use in a pediatric patient with ulcerative colitis. J Clin Gastroenterol. 2013;47(5):437-9. PubMed
  11. Pruccoli G, Silvestro E, Pace Napoleone C, Aidala E, Garazzino S, Scolfaro C. Are probiotics safe? Bifidobacterium bacteremia in a child with severe heart failure. Infez Med. 2019;27(2):175-178.
  12. Sendil S, Shrimanker I, Mansoora Q, Goldman J, Nookala VK. Lactobacillus rhamnosus bacteremia in an immunocompromised renal transplant patient. Cureus. 2020;12(2):e6887. PubMed
  13. Albarillo FS, Shah U, Joyce C, Slade D. Lactobacillus rhamnosus Infection: A single-center 4-year descriptive analysis. J Glob Infect Dis. 2020;12(3):119-123. PubMed
  14. Pasala S, Singer L, Arshad T, Roach K. Lactobacillus endocarditis in a healthy patient with probiotic use. IDCases. 2020;22:e00915. PubMed
  15. Agrawal S, Tuchman ES, Bruce MJ, Theodorou ME. Fatal Lactobacillus endocarditis in a patient with transcatheter aortic valve replacement. BMJ Case Rep. 2020;13(11):e236835.
  16. Antoun M, Hattab Y, Akhrass FA, Hamilton LD. Uncommon pathogen, Lactobacillus, causing infective endocarditis: Case report and review. Case Rep Infect Dis. 2020;2020:8833948. PubMed
  17. Rossi F, Amadoro C, Gasperi M, Colavita G. Lactobacilli infection case reports in the last three years and safety implications. Nutrients. 2022;14(6):1178. PubMed
  18. Franko B, Vaillant M, Recule C, Vautrin E, et al. Lactobacillus paracasei endocarditis in a consumer of probiotics. Med Mal Infect. 2013;43(4):171-3. PubMed
  19. Campbell RE, Miller A, Afroze A. Native valve endocarditis secondary to Lactobacillus paracasei bacteremia. Consultant. 2020;60(9):27-8. DOI
  20. Kato K, Funabashi N, Takaoka H, et al. Lactobacillus paracasei endocarditis in a consumer of probiotics with advanced and severe bicuspid aortic valve stenosis complicated with diffuse left ventricular mid-layer fibrosis. Int J Cardiol. 2016;224:157-161. PubMed

See these in context on the Bacillus Coagulans monograph →

Bacillus Subtilis 10 references
  1. Pierce A. The American Pharmaceutical Association Practical Guide to Natural Medicines. New York: The Stonesong Press, 1999:19.
  2. Lampropoulos PK, Gkentzi D, Tzifas S, Dimitriou G. Neonatal sepsis due to Bacillus subtilis. Cureus 2021;13(9):e17692. PubMed
  3. La Jeon Y, Yang JJ, Kim MJ, et al. Combined Bacillus licheniformis and Bacillus subtilis infection in a patient with oesophageal perforation. J Med Microbiol 2012;61(Pt 12):1766-1769. PubMed
  4. Wallet F, Crunelle V, Roussel-Delvallez M, Fruchart A, Saunier P, Courcol RJ. Bacillus subtilis as a cause of cholangitis in polycystic kidney and liver disease. Am J Gastroenterol 1996;91(7):1477-8.
  5. Velasco E, Martins CA, Tabak D, Bouzas LF. "Bacillus subtilis" infection in a patient submitted to a bone marrow transplantation. Rev Paul Med 1992;110(3):116-7.
  6. Kato A, Yoshifuji A, Komori K, et al. A case of Bacillus subtilis var. natto bacteremia caused by ingestion of natto during COVID-19 treatment in a maintenance hemodialysis patient with multiple myeloma. J Infect Chemother 2022;28(8):1212-1215. PubMed
  7. Freedman KE, Hill JL, Wei Y, et al. Examining the gastrointestinal and immunomodulatory effects of the novel probiotic Bacillus subtilis DE111. Int J Mol Sci 2021;22(5):2453. PubMed
  8. Lefevre M, Racedo SM, Denayrolles M, et al. Safety assessment of Bacillus subtilis CU1 for use as a probiotic in humans. Regul Toxicol Pharmacol 2017;83:54-65. PubMed
  9. Hanifi A, Culpepper T, Mai V, et al. Evaluation of Bacillus subtilis R0179 on gastrointestinal viability and general wellness: a randomised, double-blind, placebo-controlled trial in healthy adults. Benef Microbes 2015;6(1):19-27. PubMed
  10. Tokano M, Tarumoto N, Imai K, et al. A case of bacterial meningitis caused by Bacillus subtilis var. natto. Intern Med. 2022. Epub ahead of print.

See these in context on the Bacillus Subtilis 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

Keep exploring