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Dietary supplement

IsoFresh Probiotic Ingredients & Drug Interactions

by Fairhaven Health

Capsule Category: Non-nutrient/non-botanical
Most serious interaction: Moderate
The interaction bottom line Most serious interaction: Moderate

IsoFresh Probiotic is a dietary supplement by Fairhaven Health with 1 active ingredient. Its ingredients are commonly taken for digestive health and balance, diarrhea (including antibiotic-related), vaginal yeast and bacterial infections.Based on those ingredients, 182 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Probiotic Blend. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

HelloPharmacist Scorecard of IsoFresh Probiotic by Fairhaven Health

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 0 of its 5 active ingredients.
  • “Probiotic Blend” is a proprietary blend — the label doesn't break down how much of each component you get.

IsoFresh Probiotic contains 5 active ingredients: four live probiotic bacterial strains—Lactobacillus acidophilus, Lactobacillus rhamnosus, Bifidobacterium animalis lactis, Bifidobacterium longum, and Lactobacillus reuteri—plus a blend container. These are beneficial bacteria meant to support gut health.

The capsule also includes inactive ingredients like microcrystalline cellulose, vegetable capsule material, magnesium stearate, and silicon dioxide, which help deliver and stabilize the probiotics.

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: vaginal health support for women.
  • We looked for evidence on: Bacterial vaginosis, Vaginal candidiasis, Urogenital infections, Vaginal flora balance.
  • The strongest evidence on file: Lactobacillus Acidophilus is rated "Possibly Effective" for Bacterial vaginosis (Natural Medicines).
  • Also on file: Lactobacillus Acidophilus is rated "Insufficient Reliable Evidence To Rate" for Vaginal candidiasis.

Lactobacillus acidophilus has "Possibly Effective" evidence for irritable bowel syndrome (IBS), Helicobacter pylori infection, antibiotic-associated diarrhea, and bacterial vaginosis. It's rated "Possibly Ineffective" for atopic disease and has insufficient evidence for acute respiratory distress syndrome.

Bifidobacterium longum shows insufficient evidence for age-related cognitive decline, allergic rhinitis (hay fever), antibiotic-associated diarrhea, anxiety, asthma, and athletic performance. For the other strains in this product, effectiveness data isn't established in what we hold.

The evidence, ingredient by ingredient Lactobacillus Acidophilus Bifidobacterium Longum

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 2 of the 2 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 2 of 2.
  • General safety write-ups exist for 2 of 2.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Lactobacillus acidophilus is generally well tolerated in healthy adults and children, though the safety data are limited—check with your doctor before use. Bifidobacterium longum is generally well tolerated in healthy people but warrants caution if you're seriously ill or immune-compromised; limited safety data exist overall.

Both ingredients can occasionally cause mild gastrointestinal side effects like bloating, gas, abdominal discomfort, or diarrhea, though these are uncommon. Rare serious infections (bacteremia, sepsis) have been reported in clinical literature, mostly in critically ill or immunocompromised patients.

For pregnancy, Lactobacillus acidophilus is rated "Possibly Safe"; Bifidobacterium longum is rated "Possibly Safe" in both pregnancy and lactation.

Side effects, ingredient by ingredient Lactobacillus Acidophilus Bifidobacterium Longum

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 2 matched ingredients can interact with medications — Lactobacillus Acidophilus, Bifidobacterium Longum.
  • 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.

If you take antibiotic drugs, separate your doses from IsoFresh Probiotic by a few hours—antibiotics can kill the beneficial bacteria in the supplement and reduce its effectiveness. We couldn't check interactions for Lactobacillus rhamnosus, Bifidobacterium animalis lactis, or Lactobacillus reuteri, so mention those names to your pharmacist as well if you want a complete review.

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 for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

IsoFresh Probiotic may be worth considering if you have IBS, antibiotic-associated diarrhea, or certain other digestive or bacterial concerns where the Lactobacillus acidophilus has "Possibly Effective" evidence. The key is timing: if you take antibiotics, space them out from this supplement so the live organisms aren't killed off.

If you're seriously ill, immune-compromised, or pregnant or breastfeeding, talk with your doctor or pharmacist before starting.

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

Assessment coverage: 2 of 5 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jul 23, 2020.

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 IsoFresh Probiotic, straight from the product label.

Brand Fairhaven Health
Barcode (UPC) 896593002244
Net contents 30 Capsule(s)
Market status On market
Date entered into DSLD Jul 23, 2020
DSLD ID 229943
Product type Non-nutrient/non-botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult Female (18 - 50 Years), Seniors/Mature (>50 Years) - Women ONLY
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 IsoFresh Probiotic by Fairhaven Health, 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)
UPC/BARCODE
896593002244
IngredientAmount% DV
Lactobacillus acidophilus0 NP--
Lactobacillus rhamnosus0 NP--
Bifidobacterium animalis lactis0 NP--
Bifidobacterium longum0 NP--
Lactobacillus reuteri0 NP--
Probiotic Blend0 NP--

Other ingredients: Microcrystalline Cellulose, Vegetable Capsule, Magnesium Stearate, 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.
Suggested/Recommended/Usage/Directions

Recommended use: Take 1 capsule daily as a dietary supplement.

Formula

IsoFresh Probiotic is formulated for the unique needs of women, with specific probiotic strains to support vaginal health.

Precautions

Caution: Take only as directed.

Consult your health care provider before taking if you are pregnant, lactating, or if you are under care for a medical condition.

Contains milk.

Formulation

The IsoFresh Probiotic bottle is designed with an inner liner to ensure maximum potency.

Made in USA

Supports vaginal health and helps replenish healthy bacteria

Storage

Store in a cool, dry place. Once open, close the cap tightly between use and use within 90 days.

FDA Statement of Identity

Dietary Supplement

General Statements

One month supply

Colony-forming unit

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.

See for yourself

IsoFresh Probiotic by Fairhaven Health label

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

What’s inside

The Ingredients in IsoFresh Probiotic by Fairhaven Health

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

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

Probiotic Blend

Interacts with
182 drugs
0 NP per serving

Lactobacillus acidophilus is a 'friendly' bacterium used as a probiotic to support gut and vaginal health. It is generally well tolerated in healthy p...

Probiotic Blend monograph & interactions

Other (inactive) ingredients: Microcrystalline Cellulose, Vegetable Capsule, Magnesium Stearate, Silicon Dioxide. These complete the product’s ingredient list but are not active constituents.

Interaction report

IsoFresh Probiotic by Fairhaven Health Drug Interactions

Want to check YOUR meds against IsoFresh 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 IsoFresh Probiotic 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.

Probiotic Blend1 drug type · 182 drugs

Antibiotic Drugs

Theoretically, taking Lactobacillus acidophilus with antibiotic drugs might decrease the effectiveness of L. acidophilus.
L. acidophilus 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 L. acidophilus preparations by at least two hours.

Likelihood Probable Evidence D
The maker

Brand information

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

Fairhaven Health

See all Fairhaven Health products
Name
Fairhaven Health, LLC
Street Address
1410 11th St.
City
Bellingham
State
WA
ZipCode
98225
Web Address
www.fairhavenhealth.com
Pharmacist Counseling Corner

IsoFresh Probiotic by Fairhaven Health: Common Questions

Does IsoFresh Probiotic by Fairhaven Health interact with any medications?
Yes. Based on its ingredients, IsoFresh 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?
IsoFresh Probiotic 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.
Will this probiotic work if I'm on antibiotics?
Not if you take them at the same time. Antibiotics kill the live bacteria in the supplement, which defeats the purpose. Space your antibiotic dose and IsoFresh apart by a few hours, and ask your doctor or pharmacist for specific timing advice.
Is IsoFresh safe during pregnancy and breastfeeding?
The Lactobacillus acidophilus in it is rated "Possibly Safe" in pregnancy. Bifidobacterium longum is "Possibly Safe" in both pregnancy and lactation. That said, data are limited overall—talk with your doctor or pharmacist before using it while pregnant or nursing.
What does each bacterial strain in this product do?
Lactobacillus acidophilus has "Possibly Effective" evidence for IBS, antibiotic-associated diarrhea, bacterial vaginosis, and H. pylori infection. The other strains (Lactobacillus rhamnosus, Bifidobacterium animalis lactis, Bifidobacterium longum, and Lactobacillus reuteri) are included for their probiotic benefits, but effectiveness evidence for most specific conditions isn't established in our data.
What side effects might I experience?
Most people tolerate it well. Mild and uncommon gastrointestinal side effects like bloating, gas, abdominal discomfort, and diarrhea have been reported. Rare serious infections (bacteremia, sepsis) have occurred in clinical literature, but mostly in critically ill or immunocompromised patients.
Does IsoFresh have any fillers or "other" ingredients?
Yes—it contains microcrystalline cellulose, magnesium stearate, and silicon dioxide as inactive ingredients, plus a vegetable capsule. These help deliver and stabilize the live probiotics.

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

Not sure if IsoFresh 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.

IsoFresh Probiotic label
Sources

Sources & How We Checked

IsoFresh 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.

Lactobacillus Acidophilus 15 references
  1. Pierce A. The American Pharmaceutical Association Practical Guide to Natural Medicines. New York: The Stonesong Press, 1999:19.
  2. Begtrup LM, de Muckadell OB, Kjeldsen J, Christensen RD, Jarbøl DE. Long-term treatment with probiotics in primary care patients with irritable bowel syndrome--a randomised, double-blind, placebo controlled trial. Scand J Gastroenterol 2013;48(10):1127-35 PubMed
  3. Chatterjee S, Kar P, Das T, Ray S, Gangulyt S, Rajendiran C, Mitra M. Randomised placebo-controlled double blind multicentric trial on efficacy and safety of Lactobacillus acidophilus LA-5 and Bifidobacterium BB-12 for prevention of antibiotic-associated
  4. Shavakhi A, Tabesh E, Yaghoutkar A, Hashemi H, Tabesh F, Khodadoostan M,Minakari M, Shavakhi S, Gholamrezaei A. The effects of multistrain probiotic compound on bismuth-containing quadruple therapy for Helicobacter pylori infection: a randomized placebo-c
  5. Karamali M, Dadkhah F, Sadrkhanlou M, et al. Effects of probiotic supplementation on glycaemic control and lipid profiles in gestational diabetes: a randomized, double-blind, placebo-controlled trial. Diabetes Metab 2016;42(4):234-41. PubMed
  6. Badehnoosh B, Karamali M, Zarrati M, et al. The effects of probiotic supplementation on biomarkers of inflammation, oxidative stress and pregnancy outcomes in gestational diabetes. J Matern Fetal Neonatal Med. 2018 May;31(9):1128-1136.
  7. Kumar S, Kumar R, Rohilla L, Jacob N, Yadav J, Sachdeva N. A high potency multi-strain probiotic improves glycemic control in children with new-onset type 1 diabetes mellitus: A randomized, double-blind, and placebo-controlled pilot study. Pediatr Diabete
  8. Shahriari A, Karimi E, Shahriari M, Aslani N, Khooshideh M, Arab A. The effect of probiotic supplementation on the risk of gestational diabetes mellitus among high-risk pregnant women: A parallel double-blind, randomized, placebo-controlled clinical trial PubMed
  9. Xiao SD, Zhang DZ, Lu H, et al. Multicenter, randomized, controlled trial of heat-killed Lactobacillus acidophilus LB in patients with chronic diarrhea. Adv Ther. 2003;20(5):253-60.
  10. 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
  11. Ozer M, Goksu SY, Shahverdiani A, Mustafa M. Lactobacillus acidophilus-induced endocarditis and associated splenic abscess. Case Rep Infect Dis 2020;2020:1382709.
  12. Sadrin S, Sennoune S, Gout B, et al. A 2-strain mixture of Lactobacillus acidophilus in the treatment of irritable bowel syndrome: A placebo-controlled randomized clinical trial. Dig Liver Dis 2020;52(5):534-540. PubMed
  13. Stoffer JN, Slingsby TJ, Giuliari GP. Lactobacillus acidophilus endophthalmitis after intravitreal bevacizumab injection requiring intraocular lens explantation. Can J Ophthalmol 2022;57(1):e21-e22. PubMed
  14. Cukovic-Cavka S, Likic R, Francetic I, Rustemovic N, Opacic M, Vucelic B. Lactobacillus acidophilus as a cause of liver abscess in a NOD2/CARD15-positive patient with Crohn's disease. Digestion 2006;73(2-3):107-10.
  15. Hui J, Ren Y, Wang Y, Han Q. Lactobacillus acidophilus endophthalmitis postcataract operation: A case report with a literature review. Ocul Immunol Inflamm 2023.

See these in context on the Lactobacillus Acidophilus monograph →

Bifidobacterium Longum 21 references
  1. Ha GY, Yang CH, Kim H, Chong Y. Case of sepsis caused by Bifidobacterium longum. J Clin Microbiol 1999;37:1227-8.
  2. Pierce A. The American Pharmaceutical Association Practical Guide to Natural Medicines. New York: The Stonesong Press, 1999:19.
  3. Xiao JZ, Takahashi S, Odamaki T, et al. Antibiotic susceptibility of bifidobacterial strains distributed in the Japanese market. Biosci Biotechnol Biochem. 2010;74(2):336-42. PubMed
  4. Rautava S, Kainonen E, Salminen S, Isolauri E. Maternal probiotic supplementation during pregnancy and breast-feeding reduces the risk of eczema in the infant. J Allergy Clin Immunol. 2012;130(6):1355-60. PubMed
  5. 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.
  6. Pellonperä O, Vahlberg T, Mokkala K, et al. Weight gain and body composition during pregnancy: a randomised pilot trial with probiotics and/or fish oil. Br J Nutr. 2020 Nov 4:1-11. PubMed
  7. Pellonperä O, Mokkala K, Houttu N, et al. Efficacy of fish oil and/or probiotic intervention on the incidence of gestational diabetes mellitus in an at-risk group of overweight and obese women: A randomized, placebo-controlled, double-blind clinical trial PubMed
  8. Shahriari A, Karimi E, Shahriari M, Aslani N, Khooshideh M, Arab A. The effect of probiotic supplementation on the risk of gestational diabetes mellitus among high-risk pregnant women: A parallel double-blind, randomized, placebo-controlled clinical trial PubMed
  9. Esaiassen E, Hjerde E, Cavanagh JP, Simonsen GS, Klingenberg C; Norwegian Study Group on Invasive Bifidobacterial Infections. Bifidobacterium bacteremia: Clinical characteristics and a genomic approach to assess pathogenicity. J Clin Microbiol. 2017;55(7) PubMed
  10. Enomoto T, Sowa M, Nishimori K, et al. Effects of bifidobacterial supplementation to pregnant women and infants in the prevention of allergy development in infants and on fecal microbiota. Allergol Int 2014;63(4):575-85. PubMed
  11. US Food and Drug Administration (FDA). Dear Healthcare Provider Letter: Warning Regarding Use of Probiotics in Preterm Infants. September 2023. Available at: https://www.fda.gov/media/172606/download?attachment. Accessed November 1, 2023.
  12. Pillai A, Tan J, Paquette V, Panczuk J. Does probiotic bacteremia in premature infants impact clinically relevant outcomes? A case report and updated review of literature. Clin Nutr ESPEN. 2020;39:255-259. PubMed
  13. Sabaté JM, Iglicki F. Effect of Bifidobacterium longum 35624 on disease severity and quality of life in patients with irritable bowel syndrome. World J Gastroenterol 2022;28(7):732-744.
  14. Malaguarnera M, Greco F, Barone G, Gargante MP, Malaguarnera M, Toscano MA. Bifidobacterium longum with fructo-oligosaccharide (FOS) treatment in minimal hepatic encephalopathy: a randomized, double-blind, placebo-controlled study. Dig Dis Sci 2007;52(11) PubMed
  15. Zbinden A, Zbinden R, Berger C, Arlettaz R. Case series of Bifidobacterium longum bacteremia in three preterm infants on probiotic therapy. Neonatology 2015;107(1):56-9.
  16. Tamaki H, Nakase H, Inoue S, et al. Efficacy of probiotic treatment with Bifidobacterium longum 536 for induction of remission in active ulcerative colitis: A randomized, double-blinded, placebo-controlled multicenter trial. Dig Endosc 2016;28(1):67-74.
  17. Bertelli C, Pillonel T, Torregrossa A, et al. Bifidobacterium longum bacteremia in preterm infants receiving probiotics. Clin Infect Dis 2015;60(6):924-7. PubMed
  18. Esaiassen E, Cavanagh P, Hjerde E, Simonsen GS, Støen R, Klingenberg C. Bifidobacterium longum subspecies infantis bacteremia in 3 extremely preterm infants receiving probiotics. Emerg Infect Dis 2016;22(9):1664-6.
  19. Tena D, Losa C, Medina MJ, Sáez-Nieto JA. Peritonitis caused by Bifidobacterium longum: case report and literature review. Anaerobe 2014;27:27-30. PubMed
  20. Sangkanjanavanich S, Pradubpongsa P, Mitthamsiri W, Sangasapaviliya A, Boonpiyathad T. Bifidobacterium infantis 35624 efficacy in patients with uncontrolled asthma: A randomized placebo-controlled trial. Ann Allergy Asthma Immunol 2022;129(6):790-792. PubMed
  21. Wilson HL, Ong CW. Bifidobacterium longum vertebrodiscitis in a patient with cirrhosis and prostate cancer. Anaerobe 2017;47:47-50. PubMed

See these in context on the Bifidobacterium Longum 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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