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Dietary supplement

Fortify Optima Daily Probiotic 50 Billion Ingredients & Drug Interactions

by Nature's Way

Fortify Optima Daily Probiotic 50 Billion label
See full label image
Capsule Category: Non-nutrient/non-botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Fortify Optima Daily Probiotic 50 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: Moderate

Fortify Optima Daily Probiotic 50 Billion is a dietary supplement by Nature's Way with 2 active ingredients.Based on those ingredients, 182 medications have a known interaction with it, the most serious rated moderate. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Fortify Optima Daily Probiotic 50 Billion by Nature's Way

Ask about any prescription or over-the-counter medication and we check it for interactions with Fortify Optima Daily Probiotic 50 Billion by Nature's Way — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Fortify Optima Daily Probiotic 50 Billion by Nature's Way

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

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 6 active ingredients.
  • “Bifidobacteria Blend” is a proprietary blend — the label doesn't break down how much of each component you get.
  • “Lactobacilli Blend” is a proprietary blend — the label doesn't break down how much of each component you get.
  • “Fortify Optima Daily 50 Billion CFU Proprietary Probiotic Blend” is a proprietary blend — the label gives one combined amount (330 mg) without saying how much of each component you get.

This product contains 6 active ingredients: L. acidophilus LA-14, a Bifidobacteria blend, B. animalis lactis BL-04, HOWARU (another L. acidophilus strain), B. animalis lactis BI-07, and B. longum infantis BI-26 — all live probiotic bacteria meant to support your gut health. The inactive ingredients are cellulose, hypromellose, gellan gum, magnesium stearate, and silica, which help form and stabilize the capsule.

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 support plus colon and immune support.
  • We looked for evidence on: Antibiotic-associated diarrhea, Constipation, Irritable bowel syndrome (IBS), Lactose intolerance, Inflammatory bowel disease (IBD), Clostridioides difficile infection — and 4 related terms.
  • The strongest evidence on file: Lactobacillus Acidophilus is rated "Possibly Effective" for Antibiotic-associated diarrhea (Natural Medicines).
  • Also on file: Lactobacillus Acidophilus is rated "Possibly Effective" for Irritable bowel syndrome (IBS).
  • Also on file: Lactobacillus Acidophilus is rated "Insufficient Reliable Evidence To Rate" for Constipation, Inflammatory bowel disease (IBD), Radiation-induced diarrhea, Lactose intolerance, and more.

The L. acidophilus strains we checked show possibly effective evidence for irritable bowel syndrome (IBS), Helicobacter pylori infection, antibiotic-associated diarrhea, and bacterial vaginosis. They're rated possibly ineffective for atopic disease, and there isn't enough reliable evidence yet to rate them for acute respiratory distress syndrome (ARDS).

We don't have effectiveness data on file for the Bifidobacteria strains in this product.

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.

L. acidophilus is generally well tolerated in healthy adults and children. The product notes you should check with your doctor before use because data are limited.

In rare cases, live probiotic organisms can theoretically cause infection in certain patients, though most documented cases appear linked to bacteria moving from places where they naturally live in your body. When taken with other probiotics, some people experience mild gastrointestinal side effects like bloating, gas, abdominal discomfort, or diarrhea, but these are uncommon.

One clinical trial noted two cases of rash and one of itching, though it wasn't clear whether L. acidophilus or another ingredient was responsible. No pregnancy or breastfeeding safety data is on file for these ingredients.

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?
  • 1 of the 1 matched ingredient can interact with medications — Lactobacillus Acidophilus.
  • 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 antibiotics, space them several hours apart from this probiotic — the antibiotics can kill the live organisms before they work. Run your full medication list through the checker on this page to be sure.

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.

This probiotic may help if you're dealing with IBS, antibiotic-related diarrhea, or certain infections — talk to your pharmacist about whether it fits your situation. If you take antibiotics, you'll need to time this product separately to get the most out of it.

Most people tolerate it well, but check with your doctor first, especially if you have a weakened immune system or serious underlying illness.

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

Assessment coverage: 2 of 6 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jul 24, 2025.

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 Fortify Optima Daily Probiotic 50 Billion, straight from the product label.

Brand Nature's Way
Barcode (UPC) 033674103371
Net contents 30 Delayed-Release Capsule(s)
Market status On market
Date entered into DSLD Jul 24, 2025
DSLD ID 333748
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 Fortify Optima Daily Probiotic 50 Billion by Nature's Way, 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
30
UPC/BARCODE
033674103371
IngredientAmount% DV
L. acidophilus LA-140 NP--
Bifidobacteria Blend0 NP--
B. animalis lactis BL-040 NP--
HOWARU0 NP--
B. animalis lactis BI-070 NP--
B. longum infantis BI-260 NP--
Lactobacilli Blend0 NP--
Fortify Optima Daily 50 Billion CFU Proprietary Probiotic Blend330 mg--
Bifidobacterium0 NP--

Other ingredients: Cellulose, Hypromellose, Gellan Gum, Magnesium Stearate, Silica

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.
Formulation

Guaranteed potency Targeted delivery Plant-derived, delayed-release capsule survives stomach acid to distribute live cultures where they're needed most - in the intestine and colon

Gluten and diary free. No soy or artificial colors.

Packaged and tested in the USA

Daily support for colon health

Formula

Guarantees 50 billion live probiotic cultures through the date of expiration Formulated with 6 diverse probiotic strains

50 billion live cultures

Advanced care probiotic for digestive support plus colon & immune support 6 diverse probiotic strains

Howaru Probiotic Quality you can feel

Advanced care formula with 50 billion live cultures and 6 diverse probiotic strains with Lactobacilli and Bifidobacteria cultures for digestive support Supports immune health with clinically studied B. lactis Bi-07 and B. lactis BL-04

Storage

No refrigeration needed

May be refrigerated.

Store at room temperature. Avoid excessive heat and direct sunlight.

FDA Disclaimer Statement

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

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

FDA Statement of Identity

Probiotic Supplement

Suggested/Recommended/Usage/Directions

Recommendation: Adults take 1 capsule daily. May be taken at any time, with or without food.

Precautions

If you are pregnant, nursing, or taking any medications, consult a healthcare professional before use.

Keep out of reach of children.

This product has a tamper-evident foil pouch. Do not use if foil or plastic is punctured.

Seals/Symbols

Howaru Probiotic Quality you can feel

Brand IP Statement(s)

Howaru Probiotic Quality you can feel Howaru is a registered trademark of IFF and is used under license. The probiotic strains contained in this product are manufactured by IFF. Copyright 2024 Nature's Way Brands, LLC

General Statements

Questions? 1-800-962-8873 / fortifyprobiotics.com

Explore more products at naturesway.com

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

See for yourself

Fortify Optima Daily Probiotic 50 Billion by Nature's Way label

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

Fortify Optima Daily Probiotic 50 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 Fortify Optima Daily Probiotic 50 Billion by Nature's Way

These are the 2 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container30 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.

Fortify Optima Daily 50 Billion CFU Proprietary Probiotic Blend

330 mg per serving
  • › Bifidobacteria Blend
  • › Lactobacilli Blend

Other (inactive) ingredients: Cellulose, Hypromellose, Gellan Gum, Magnesium Stearate, Silica. These complete the product’s ingredient list but are not active constituents.

Interaction report

Fortify Optima Daily Probiotic 50 Billion by Nature's Way Drug Interactions

Want to check YOUR meds against Fortify Optima Daily Probiotic 50 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
182Drugs
182 Moderate

Ingredients driving the most interactions

Individual Drug Interactions

The ingredients in Fortify Optima Daily Probiotic 50 Billion interact with 182 drugs. Click any drug to see the details.

0 of the 2 ingredients in Fortify Optima Daily Probiotic 50 Billion interact with drugs. Each result below shows which ingredient is responsible.

Each ingredient & the kinds of drugs it affects

For each ingredient in Fortify Optima Daily Probiotic 50 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.

The maker

Brand information

Manufacturer and brand details for Fortify Optima Daily Probiotic 50 Billion, from the product label.

Nature's Way

See all Nature's Way products
Name
Nature's Way Brands, LLC
City
Green Bay
State
WI
ZipCode
54311
Phone Number
1-800-962-8873
Web Address
naturesway.com
Pharmacist Counseling Corner

Fortify Optima Daily Probiotic 50 Billion by Nature's Way: Common Questions

Does Fortify Optima Daily Probiotic 50 Billion by Nature's Way interact with any medications?
Yes. Based on its ingredients, Fortify Optima Daily Probiotic 50 Billion 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?
Fortify Optima Daily Probiotic 50 Billion contains 2 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 help with my IBS?
The L. acidophilus strains in this product are rated possibly effective for IBS, meaning there's some evidence they may help, but more research is needed. Results vary person to person, so it's worth discussing with your doctor whether it's a good fit for you.
Can I take this while I'm on antibiotics?
You can take both, but don't take them at the same time. Antibiotics kill bacteria — including the live organisms in this probiotic. Ask your pharmacist to help you space them out, usually a few hours apart, so the probiotic can do its job.
What side effects might I notice?
Most people have no problems. Some experience mild gas, bloating, or abdominal discomfort when they first start, especially if they're also taking other probiotics, but these are uncommon and usually pass. In one trial, a couple of people developed a rash, though it wasn't clear if the probiotic caused it.
Is it safe if I'm pregnant or breastfeeding?
We don't have pregnancy or breastfeeding safety data on file for these ingredients. Talk with your doctor or midwife before starting — they can weigh the potential benefits against what's known and give you personalized advice.
What's the difference between the L. acidophilus strains in here?
This product contains two L. acidophilus strains — LA-14 and HOWARU — both possibly effective for IBS, antibiotic-related diarrhea, and a couple of other conditions. They're different strains, so they may behave slightly differently in your gut, but both have similar evidence behind them.
Should I be worried about infection from live probiotics?
Serious infections from L. acidophilus are very rare. They've been documented in a few cases, usually in people with weakened immune systems or serious underlying illness. If you're generally healthy, the risk is low, but if you have a compromised immune system, talk to your doctor first.

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

Not sure if Fortify Optima Daily Probiotic 50 Billion is safe with your meds?

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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.

Fortify Optima Daily Probiotic 50 Billion label
Sources

Sources & How We Checked

Fortify Optima Daily Probiotic 50 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 15 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 →

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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