Olive Leaf Extract Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Olive Leaf Extract 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 Extract is a dietary supplement by Douglas Laboratories with 1 active ingredient. 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 Extract by Douglas Laboratories
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 one active ingredient: olive leaf extract, derived from the leaves of the olive plant. Olive leaf extract has been traditionally used and studied for potential effects on several conditions, including bone health, digestion, shingles, respiratory infections, and joint health.
The capsule itself is made from hydroxypropyl methylcellulose (a plant-based capsule material), with microcrystalline cellulose and vegetable stearate as inactive ingredients.
Does it work?
Couldn't assess
The evidence for olive leaf extract is not yet established for any of the conditions it's marketed for. Our data rates it as having insufficient reliable evidence for osteoporosis, indigestion (dyspepsia), exercise-induced respiratory infections, shingles (herpes zoster), influenza, and osteoarthritis.
That doesn't mean it doesn't work — it means the clinical trials so far aren't robust enough to say either way. If you're considering it for any of these uses, talk it over with your doctor to weigh what limited evidence exists against your personal situation.
How safe is it?
Well-documented data
Olive fruit and olive oil as everyday foods are very safe. Olive leaf extract appears to be well tolerated in people who've used it, though it's a more concentrated form and hasn't been studied as extensively.
The most common side effects reported in trials are headache and mild stomach discomfort. One person reported skin and acne, and olive tree pollen can trigger seasonal allergy symptoms in those with pollen sensitivities.
Because concentrated supplements are less well studied than the food forms, the safety facts advise checking with your doctor before starting if you have concerns. We hold no data on safety during pregnancy or breastfeeding for this ingredient, so there isn't enough information to know either way.
Talk with your doctor or pharmacist for personalized advice if you're pregnant, planning to become pregnant, or breastfeeding.
Meds to double-check
No known interactions
No interactions are documented in our data for this ingredient. That doesn't mean interactions can't happen — it means none have been found and reported yet.
If you take any medications, ask your pharmacist to check your list before you start, 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.
Olive leaf extract is generally well tolerated, but the evidence for what it actually does isn't strong yet. If you're curious about it for bone health, digestion, joint pain, or immune support during cold season, discuss it with your doctor — they can help you decide if it's worth trying alongside anything else you're taking.
Since concentrated supplements of olive leaf are less studied than whole olives and olive oil, your doctor or pharmacist can help you weigh the unknowns.
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 Feb 25, 2021.
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 Extract, straight from the product label.
| Brand | Douglas Laboratories |
|---|---|
| Barcode (UPC) | 310539839058 |
| Net contents | 60 Vegetarian Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Feb 25, 2021 |
| DSLD ID | 245335 |
| Product type | Botanical |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten 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 Extract by Douglas Laboratories, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Olive leaf extract | 500 mg | -- |
Other ingredients: Hydroxypropyl Methylcellulose, Microcrystalline Cellulose, Vegetable Stearate
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.
Suggested/Recommended/Usage/Directions
Suggested Usage: As a dietary supplement, adults take 1 capsule daily or as directed by your health professional.
Precautions
Warning: If you are pregnant, nursing, have any health condition or taking any medication, consult your health professional before using this product.
Keep out of the reach of children.
Use only if safety seal is intact.
Storage
Store in a cool, dry place.
Formulation
Gluten-free, Non-GMO
Support for microbial balance and cardiovascular health
FDA Disclaimer Statement
This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
General Statements
Contents may not fill package in order to accommodate required labeling. Please rely on stated quantity. Scan to learn about our manufacturing excellence
FDA Statement of Identity
Dietary Supplement
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Olive Leaf Extract by Douglas Laboratories 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 Extract by Douglas Laboratories
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1 Vegetarian Capsule(s) Dosage formCapsule Servings per container60 Amounts shown are per serving.
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: Hydroxypropyl Methylcellulose, Microcrystalline Cellulose, Vegetable Stearate. These complete the product’s ingredient list but are not active constituents.
Olive Leaf Extract by Douglas Laboratories Drug Interactions
We don’t currently list any known drug interactions for the mapped ingredients in Olive Leaf Extract. 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 Extract, from the product label.
Douglas Laboratories
See all Douglas Laboratories products- Name
- Douglas Laboratories
- Street Address
- 600 Boyce Road
- City
- Pittsburgh
- State
- PA
- ZipCode
- 15205
- Phone Number
- 1.800.245.4440
- Web Address
- www.douglaslabs.com
Olive Leaf Extract by Douglas Laboratories: Common Questions
Does Olive Leaf Extract by Douglas Laboratories interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
What does olive leaf extract do?
Is olive leaf extract safe?
Can I take this while pregnant or breastfeeding?
Will this interact with my medications?
What's actually in this capsule besides the olive leaf extract?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Olive Leaf Extract 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 Extract’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 Extract'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