Olive Leaf Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Olive Leaf 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 is a dietary supplement by Kroeger Herb Products Co. with 2 active ingredients. Its ingredients are commonly taken for heart health, high blood pressure, high cholesterol.Based on those ingredients, 1 medication has a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Yarrow. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Olive Leaf by Kroeger Herb Products Co.
Ask about any prescription or over-the-counter medication and we check it for interactions with Olive Leaf by Kroeger Herb Products Co. — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
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HelloPharmacist Scorecard of Olive Leaf by Kroeger Herb Products Co.
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
Low disclosure
This product contains 2 active ingredients: olive and yarrow, delivered in vegetarian capsules. Olive leaf is the primary ingredient here, and yarrow rounds out the blend.
Both are herbal extracts — more concentrated than you'd get from food alone.
Does it work?
Not established
The evidence for what this product can do isn't established in the data we hold. Olive has been studied for osteoporosis, indigestion, exercise-related respiratory infections, shingles, flu, and osteoarthritis, but the evidence for each is rated insufficient.
Yarrow similarly shows insufficient reliable evidence for wound healing, eczema, menstrual pain, yeast infection, and sore throat. If you're considering it for a specific reason, talk it over with your doctor or pharmacist about whether the current research supports its use.
How safe is it?
Well-documented data
Olive fruit and oil as foods are very safe, but concentrated supplements like this one are less well studied — check with your doctor before using if you have concerns. Yarrow is generally well tolerated when taken by mouth, though headache and stomach discomfort have been reported with olive leaf, and a small number of people reported skin problems.
Yarrow should be avoided during pregnancy (the safety data advise against it) and while breastfeeding (not enough data to know either way). Topically, yarrow can cause allergic skin reactions in sensitive people.
Meds to double-check
Moderate interaction found
If you take lithium, clear this product with your doctor or pharmacist first — yarrow in the blend may raise your lithium levels and need a dose adjustment. For any other prescription medications you take, use the search tool on this page to verify there are no other interactions.
The bottom line
Scorecard at a glanceFormula with limited ingredient disclosure with no established evidence rating for its marketed use. Moderate medication interactions have been identified, and safety information is well characterized.
This is an herbal blend without strong evidence behind it yet. If you take lithium, you'll want to check with your doctor or pharmacist before starting — yarrow could affect your lithium levels.
Pregnant or breastfeeding folks should also talk it over with their healthcare provider first, since yarrow carries safety concerns in those situations.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 2 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jan 23, 2023.
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, straight from the product label.
| Brand | Kroeger Herb Products Co. |
|---|---|
| Barcode (UPC) | 696916100240 |
| Net contents | 100 Vegetarian Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Jan 23, 2023 |
| DSLD ID | 282506 |
| 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 by Kroeger Herb Products Co., sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Proprietary Blend | 700 mg | -- |
| Total Carbohydrate | 1 Gram(s) | 1% |
| Olive | 0 NP | -- |
| Yarrow | 0 NP | -- |
Other ingredients: Vegetarian Source Capsules
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.
Precautions
Do not purchase if seal is broken.
Keep out of reach of children.
Formulation
Maintains a healthy immune system
Contains no: Yeast, wheat, gluten, corn, rice or preservatives.
FDA Statement of Identity
Herbal Supplement
Suggested/Recommended/Usage/Directions
Directions: 2 capsules 2 times daily after meals.
General Statements
A 25 day supply.
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.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Olive Leaf by Kroeger Herb Products Co. 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 by Kroeger Herb Products Co.
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 container25 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.
Other (inactive) ingredients: Vegetarian Source Capsules. These complete the product’s ingredient list but are not active constituents.
Olive Leaf by Kroeger Herb Products Co. Drug Interactions
HelloPharmacist Interaction Report
Olive Leaf by Kroeger Herb Products Co. contains yarrow, which has a documented interaction with lithium, a mood-stabilizing medication.
Yarrow's diuretic properties may reduce how your body clears lithium, potentially raising its levels and side effects — meaning your lithium dose might need adjustment.
Read the full breakdown — every affected drug type, severity by severity
No interactions are documented for the olive ingredient we checked. We could not verify interaction data for the proprietary blend itself, since it's a container for its individual components.
If you take lithium or any other prescription medication, run it through the search tool on this page with your exact drugs before you start.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Olive Leaf?
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 checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in Olive Leaf interact with 1 drug. Click any drug to see the details.
1 of the 2 ingredients in Olive Leaf interact with drugs. Each result below shows which ingredient is responsible. Yarrow
Lithium Carbonate (prescription Drug)Eskalith, Lithium Carbonate
How Lithium Carbonate (prescription Drug) interacts with Olive Leaf — through 1 ingredient. Tap an ingredient for the detail:
YarrowLithium Moderate
Interaction Summary
Theoretically, taking yarrow with lithium might increase the levels and adverse effects of lithium.
Read the full Yarrow + Lithium Carbonate (prescription Drug) interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Olive Leaf 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.
Yarrow
Lithium
Theoretically, taking yarrow with lithium might increase the levels and adverse effects of lithium.
Animal research shows that yarrow has diuretic activity. Theoretically, due to these potential diuretic effects, yarrow might reduce excretion and increase levels of lithium. The dose of lithium might need to be decreased.
Brand information
Manufacturer and brand details for Olive Leaf, from the product label.
Kroeger Herb Products Co.
See all Kroeger Herb Products Co. products- Name
- Kroeger Herb Products Co., Inc.
- Street Address
- 1500 Kansas Avenue, Unit 4F
- City
- Longmont
- State
- CO
- ZipCode
- 80501
- Phone Number
- 303-443-0261
Olive Leaf by Kroeger Herb Products Co.: Common Questions
Does Olive Leaf by Kroeger Herb Products Co. interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Can I take this if I'm pregnant?
Is it safe to breastfeed while taking this?
What are the most common side effects?
Does this actually work for anything?
Why does it say to avoid concentrated supplements if olives and olive oil are safe foods?
What's the proprietary blend, and what's in it?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Olive Leaf 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’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Olive
Olive comes from the same tree that gives us olives and olive oil, and its leaf and fruit contain antioxidant compounds like oleuropein and hydroxytyrosol. Olive oil as part of a Mediterrane...
Read the full Olive monograph → Herb & supplement monographYarrow
Interacts with 1 drugYarrow is a traditional herb long used for wounds, digestive complaints, and colds, but high-quality human studies are very limited, so its benefits are not well proven. It is generally used...
Read the full Yarrow monograph →Sources & How We Checked
Olive Leaf'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 10 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
Yarrow 8 references
- McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
- Uter, W., Nohle, M., Randerath, B., and Schwanitz, H. J. Occupational contact urticaria and late-phase bronchial asthma caused by compositae pollen in a florist. Am J Contact Dermat. 2001;12(3):182-184. DOI
- Schempp, C. M., Schopf, E., and Simon, J. C. [Plant-induced toxic and allergic dermatitis (phytodermatitis)]. Hautarzt 2002;53(2):93-97.
- Jovanovic, M., Poljacki, M., Duran, V., Vujanovic, L., Sente, R., and Stojanovic, S. Contact allergy to Compositae plants in patients with atopic dermatitis. Med Pregl. 2004;57(5-6):209-218. PubMed
- Becker LC, Bergfeld WF, Belsito DV, et al. Safety assessment of Achillea millefolium as used in cosmetics. Int J Toxicol. 2016;35(3 suppl):5S-15S.
- Zakeri S, Esmaeilzadeh S, Gorji N, Memariani Z, Moeini R, Bijani A. The effect of Achillea millefolium L. on vulvovaginal candidiasis compared with clotrimazole: A randomized controlled trial. Complement Ther Med. 2020;52:102483. PubMed
- de Souza P, Crestani S, da Silva Rde C, et al. Involvement of bradykinin and prostaglandins in the diuretic effects of Achillea millefolium L. (Asteraceae). J Ethnopharmacol. 2013 Aug 26;149(1):157-61. PubMed
- Miranzadeh S, Adib-Hajbaghery M, Soleymanpoor L, Ehsani M. Effect of adding the herb Achillea millefolium on mouthwash on chemotherapy induced oral mucositis in cancer patients: A double-blind randomized controlled trial. Eur J Oncol Nurs. 2015;19(3):207- 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