Olive Leaf + FOS Ingredients & Drug Interactions
by NOW
What is this page for?
First and foremost: checking Olive Leaf + FOS 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
Olive Leaf + FOS is a dietary supplement by NOW with 2 active ingredients. Its ingredients are commonly taken for heart health, high blood pressure, high cholesterol.We don’t currently list a known drug interaction for its mapped ingredients — but that doesn’t guarantee none exist, so always confirm with your pharmacist.
HelloPharmacist Scorecard of Olive Leaf + FOS by NOW
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.
What’s inside
Full disclosure
This product contains 2 active ingredients: olive leaf extract and NutraFlora FOS (a type of prebiotic fiber). Olive leaf extract is made from the leaves of the olive plant.
The inactive ingredients are gelatin, cellulose, magnesium stearate, and silica — these are excipients that form and stabilize the capsule.
Does it work?
Couldn't assess
The evidence for olive leaf extract is limited. Our data shows insufficient reliable evidence to rate it for osteoporosis, indigestion (dyspepsia), exercise-related respiratory infections, shingles, flu, or osteoarthritis.
That means we don't have enough strong clinical trials yet to say whether it works for these uses — not that it doesn't work, just that the science isn't settled.
How safe is it?
Well-documented data
Olive leaf extract is generally well tolerated in the trials and reports we have on file. The most common side effects reported are headache and stomach discomfort.
One person reported acne. Olive tree pollen can trigger seasonal respiratory allergies in sensitive people.
The main caution here is that while olive oil and whole olives as food are very safe, concentrated olive leaf supplements are less studied than the food form. Safety data for the supplement specifically is not as robust.
There is insufficient information on file about this product's safety in pregnancy and lactation — talk with your doctor or pharmacist about whether it's right for you.
Meds to double-check
No known interactions
No interactions are documented in our data for the ingredients we could check. We could not verify NutraFlora FOS for drug interactions, so if you take regular medications, mention this product to your pharmacist or doctor just to be sure.
The bottom line
Scorecard at a glanceFully disclosed formula with no assessable stated purpose. No medication interactions are currently documented, and safety information is well characterized.
If you're exploring olive leaf extract and curious about its potential — and you're not pregnant, nursing, or dealing with a pollen allergy — this product is generally tolerated well. That said, we don't yet have strong evidence it works for any specific condition.
Before you start, check with your doctor or pharmacist, especially if you take any medications or have questions about safety.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 1 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Aug 26, 2014.
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
General information
Key facts about Olive Leaf + FOS, straight from the product label.
| Brand | NOW |
|---|---|
| Barcode (UPC) | 733739095374 |
| Net contents | 90 Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Aug 26, 2014 |
| DSLD ID | 36094 |
| Product type | Botanical With Nutrients |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten Free, Dairy Free |
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 Olive Leaf + FOS by NOW, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| NutraFlora FOS | 500 mg | -- |
| Olive leaf extract | 500 mg | -- |
Other ingredients: Gelatin, Cellulose, Magnesium Stearate, Silica
Tap any ingredient to jump to its full detail below.
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.
Brand IP Statement(s)
NutraFlora(R) FOS is a pleasant-tasting, concentrated source of fructooligosaccharides (FOS), a non-digestible carbohydrate which aids the growth of beneficial intestinal bacteria such as Bifidus and Acidophilus.
NutraFlora(R) is a registered trademark of GTC Nutrition.
Precautions
Caution: For adults only.
Consult physician if pregnant/nursing, taking medication, or have a medical condition.
Keep out of reach of children.
Do Not Eat Freshness Packet. Keep in Bottle.
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
General Statements
{CAPSULE} CAPSULE SIZE
Made in the USA
STANDARDIZED EXTRACT
500 mg per serving
Please Recycle.
Modern scientific studies have shown that Olive leaves have a number of compounds, mainly phenols and lignans, that protect the plant from environmental stress and may confer health benefits when consumed. Oleuropein, one of the best known active constituents of Olive Leaf, has been endowed with many health properties linked to its free radical scavenging activity.
FDA Statement of Identity
A Dietary Supplement
Seals/Symbols
QUALITY GMP ASSURED
Formulation
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.
Storage
Store in a cool, dry place after opening.
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 USAGE: As a dietary supplement, take 2 capsules 1 to 2 times daily.
General
CODE 9537 V1
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Olive Leaf + FOS by NOW label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
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)The Ingredients in Olive Leaf + FOS by NOW
These are the 2 active ingredients this product is made of. Select any to open its full monograph.
Serving size2 Capsule(s) Dosage formCapsule Servings per container45 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.
NutraFlora FOS
Olive leaf extract
No knowninteractions
Olive comes from the same tree that gives us olives and olive oil, and its leaf and fruit contain antioxidant compounds like oleuropein and hydroxytyr...
Olive leaf extract monograph & interactionsOther (inactive) ingredients: Gelatin, Cellulose, Magnesium Stearate, Silica. These complete the product’s ingredient list but are not active constituents.
Olive Leaf + FOS by NOW Drug Interactions
We don’t currently list any known drug interactions for the mapped ingredients in Olive Leaf + FOS. This doesn’t guarantee none exist — always confirm with your pharmacist before combining a supplement with your medications.
Brand information
Manufacturer and brand details for Olive Leaf + FOS, from the product label.
NOW
See all NOW products- Name
- NOW Foods
- Street Address
- 395 S. Glen Ellyn Rd.
- City
- Bloomingdale
- State
- IL
- ZipCode
- 60108
- Web Address
- www.nowfoods.com
Olive Leaf + FOS by NOW: Common Questions
Does Olive Leaf + FOS by NOW interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
What is NutraFlora FOS?
Does olive leaf extract really work for colds, flu, or arthritis?
Is olive leaf extract the same as olive oil?
What side effects should I watch for?
Can I take this if I'm pregnant or nursing?
Why does the label list inactive ingredients like gelatin and magnesium stearate?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Olive Leaf + FOS is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
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.
The Full Monographs Behind Olive Leaf + FOS’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Olive Leaf + FOS'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.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
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 2 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.
Olive 2 references
- Liccardi G, D'Amato M, D'Amato G. Oleaceae pollinosis: a review. Int Arch Allergy Immunol 1996;111:210-7. PubMed
- Somerville V, Moore R, Braakhuis A. The effect of olive leaf extract on upper respiratory illness in high school athletes: A randomised control trial. Nutrients. 2019;11(2). pii: E358. PubMed
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