Ingredient deep dive
Does the Olive Leaf in Bazopril Lower Blood Pressure? What Five Small Trials Found
The Bazopril panel names elaion tree leaf extract, which reads as olive leaf. A 2021 review pooled five small trials that used 500 to 1,000 mg a day for 6 to 12 weeks. Bazopril publishes no amount of olive leaf, so those trials cannot be matched to the capsule. No study of Bazopril itself exists.
Is elaion tree leaf extract the same as olive leaf?
Very likely. Elaion is the Greek word for olive, so elaion tree leaf extract reads as olive leaf extract, the leaf of the tree that gives olive oil.
That is our reading of an unusual name, not wording printed on the bottle. The panel shows a leaf picture and the words Elaion Tree Leaf Extract, and says nothing about which part, which strength or how much.
What did the 2021 review look at?
A group of researchers led by Ismail pooled earlier trials in a systematic review and meta-analysis. The paper is titled on olive leaf extract and the cardiometabolic profile of adults with prehypertension and hypertension, and it appeared in PeerJ in 2021 (Ismail et al., 2021).
Five small trials of olive leaf extract used 500 to 1,000 mg a day for 6 to 12 weeks. The authors noted how few people took part. That is the whole of what this site can responsibly quote.
It is a finding about those trials. It is not a finding about Bazopril.
What does a small trial let you say?
It lets you say that something may be worth studying more. It does not let you say that the plant lowers blood pressure for you.
- Few people means chance can play a big part
- A short run of weeks says little about months or years
- One extract at one amount may not match another product
- Pooling small trials averages their weaknesses, it does not remove them
Olive leaf still has the deepest research record of the six named plants. Deepest here is a relative word. It means more than the others, and it is still limited.
Why can the trials not be laid beside Bazopril?
Because the details that make a trial meaningful are the very details Bazopril leaves blank.
| Detail | In the olive leaf trials | In Bazopril |
|---|---|---|
| Amount | 500 to 1,000 mg a day | Not published |
| Length | 6 to 12 weeks | No timeline published |
| Form | Olive leaf extract | Elaion tree leaf extract named, strength not published |
| People | Adults with prehypertension and hypertension | Sold to adults 18 and over, no condition stated |
| Product | Extracts used by the researchers | Finished capsule never tested in a published trial |
If a capsule held a small fraction of 500 mg, the trials would say little about it. If it held more, that would raise other questions. Without a number, both readings stay open.
Does olive leaf have safety notes?
The public sources we use do not list an interaction note for olive leaf in the way they do for garlic, tea and hawthorn. That is not proof that none exists. It means we hold no note to quote.
The side-effects table on this site suggests one practical step for this plant: keep taking your own readings with your doctor. Since no amount is published, the trial doses cannot be matched, and a clinician is the right person to weigh your situation.
For the plants that do carry notes, see our safety post.
How does olive leaf compare with the other five plants?
It has more human research than hawthorn, conifer berry or mallow. Garlic and tea also have reviews, and NCCIH lists them with modest evidence for blood pressure (NCCIH).
All six share one gap. Each is named, and none has an amount. Our plant-by-plant post goes through the full set.
What would make the olive leaf claim checkable?
Three published items would do it. A Supplement Facts panel with a weight beside the olive leaf. A statement of extract strength. A lab certificate matched to the lot.
A weight beside the name
Milligrams per serving, in a panel.
A serving size
How many capsules a day the weight refers to.
A lab sheet for your lot
Proof that the capsule holds what the panel says.
Until those exist, the olive leaf name is a name, and the trials remain a story about other products.
What should you ask your doctor?
Bring the six plant names and your medicine list. Ask whether anything on the list calls for caution, and whether home readings are needed while you try a new supplement.
Do not change a prescription because olive leaf has some research. Medicine and supplement are different things, and no supplement has been shown to do what prescription blood pressure medicine does.
How can you read the review yourself?
You do not need a science degree to check our summary. The paper is listed in the sources below, and a few simple questions open it up.
- Who wrote it, and in which journal and year?
- How many trials did it pool, and how many people took part?
- What amount of extract did each trial use, and for how long?
- What did the authors say about weaknesses?
- Did any trial study a finished capsule rather than a plain extract?
If a page quotes a study and cannot answer those five questions, treat the quote as decoration.
Key facts
- The panel names Elaion Tree Leaf Extract. Elaion is Greek for olive, so it reads as olive leaf.
- A 2021 review pooled five small olive leaf trials: 500 to 1,000 mg a day for 6 to 12 weeks.
- The review authors noted how few people took part.
- Bazopril publishes no amount, serving size or extract strength.
- No study of Bazopril itself is published.
- Olive leaf has the deepest research of the six plants, which is still limited.
- Never stop or change a prescribed blood pressure medicine to try a supplement.
| Item | What is published |
|---|---|
| Bottle | 60 capsules, dietary supplement |
| Pack sizes | 1, 3 or 6 bottles (60, 180 or 360 capsules) |
| Price | Not published here. Shown at checkout |
| Guarantee | 60 days from purchase, unless the sales page prints a longer window |
| Return postage | Paid by the buyer, with tracking |
| Order desk | +1 (100) 819-1122 |
Is a food-first view part of the picture?
The agencies we cite point to the same short list of habits before any bottle: the way you eat, how much you move, your weight, alcohol, smoking, sleep and stress. A leaf extract does not replace any of them.
If olive leaf appeals to you, treat it as a small extra to discuss with your doctor, and keep the larger habits in front.
Sources for this post
- Ismail MA, et al. Olive leaf extract effect on cardiometabolic profile among adults with prehypertension and hypertension: a systematic review and meta-analysis. PeerJ, 2021. Source
- National Center for Complementary and Integrative Health. Hypertension (High Blood Pressure). Source
- National Center for Complementary and Integrative Health. Garlic: Usefulness and Safety. Updated February 2025. Source
- National Center for Complementary and Integrative Health. Green Tea: Usefulness and Safety. Updated February 2025. Source
- National Center for Complementary and Integrative Health. Hawthorn: Usefulness and Safety. Updated April 2025. Source
- NIH Office of Dietary Supplements. Dietary Supplements: What You Need to Know. Source
Frequently asked questions
Does olive leaf lower blood pressure?
Five small trials in a 2021 review used it at 500 to 1,000 mg a day for 6 to 12 weeks. The trials were small, and they do not prove an effect for any one person.
How much olive leaf is in Bazopril?
Not published. The panel names the plant and prints no weight.
Is elaion tree leaf extract definitely olive leaf?
That is our reading of the name. Elaion is Greek for olive. The label does not say so in plain words.
Can I take the trial dose from Bazopril?
No. Bazopril publishes no amount and no serving size, so a trial dose cannot be matched or reached from it.
Does olive leaf interact with medicines?
The sources we use list no interaction note for olive leaf, which is not proof of none. Ask your pharmacist to check your list.
Does this mean Bazopril works?
No. The trials studied olive leaf extracts, not Bazopril. No study of the finished capsule is published.
Our view
Olive leaf is the most interesting plant on the panel and the best example of why a number matters. The research exists. The number on the bottle does not.
So the fair reading is modest. The plant has some small trials behind it, and the capsule has none of its own.
If this is the plant that drew you in, ask for the panel, ask your doctor, and keep your prescriptions as they are.
Keep reading: The six plants · What is in Bazopril? · Does it really work?
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Check the live total before you pay
If olive leaf is the plant that interests you, read the panel on your own bottle first. The order page shows the live total and the written guarantee terms.
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