What is it used for?
Source of antioxidants/Provides antioxidants [Source note 2].
Source of antioxidants/Provides antioxidants that help fight/protect (cell) against/reduce (the oxidative effect of/the oxidative damage caused by/cell damage caused by) free radicals [Source note 3].
Used in Herbal Medicine as a diuretic [Source note 4].
Who does this guide cover?
Adults 18 years and older
How is it taken?
Oral
Which forms are covered?
this reference excludes foods or food-like dosage forms as indicated in the Compendium of references Guidance Document.
Quantities
Antioxidant
Methods of preparation: Dry, Powdered, Non-Standardized Ethanolic Extracts (Dry extract, Tincture, Fluid extract)
Not to exceed 3.5 grams of dried leaf, per day [Source note 5].
Methods of preparation: Standardized Ethanolic Extracts (Dry extract, Tincture, Fluid extract)
Not to exceed 3.5 grams of dried leaf, per day and 20.8 % oleuropein [Source note 6].
Methods of preparation: Decoction, Decoction concentrate
Not to exceed 10 grams of dried leaves, per day and 5 grams per single dose [Source note 7].
Not to exceed 20 grams of fresh leaves, per day and 10 grams per single dose [Source note 8].
Methods of preparation: Decoction standardized, Decoction concentrate standardized
Not to exceed 10 grams of dried leaves per day, 5 grams per single dose and 20.8 % oleuropein [Source note 9].
Not to exceed 20 grams of fresh leaves per day, 10 grams per single dose and 20.8 % oleuropein [Source note 10].
Methods of preparation: Infusion, Infusion concentrate
Not to exceed 30 grams of dried leaves, per day and 8 grams per single dose [Source note 11].
Methods of preparation: Infusion standardized, Infusion concentrate standardized
Not to exceed 30 grams of dried leaves, per day, 8 grams per single dose and 20.8 % oleuropein [Source note 12].
Diuretic
Methods of preparation: Dry, Powdered, Non-Standardized Ethanolic Extracts (Dry extract, Tincture, Fluid extract)
0.6 - 3.5 grams of dried leaves, per day [Source note 13].
Methods of preparation: Standardized Ethanolic Extracts (Dry extract, Tincture, Fluid extract)
0.6 - 3.5 grams of dried leaves, per day and not to exceed 20.8 % oleuropein [Source note 14].
Methods of preparation: Decoction, Decoction concentrate
5 grams of dried leaves, 1 to 2 times per day [Source note 15].
10 grams of fresh leaves, 1 to 2 times per day [Source note 16].
Methods of preparation: Decoction standardized, Decoction concentrate standardized
5 grams of dried leaves, 1 to 2 times per day and not to exceed 20.8 % oleuropein [Source note 17].
10 grams of fresh leaves, 1 to 2 times per day and not to exceed 20.8 % oleuropein [Source note 18].
Methods of preparation: Infusion, Infusion concentrate
7 - 8 g dried leaves, 1 to 3 times per day [Source note 19].
Methods of preparation: Infusion standardized, Infusion concentrate standardized
7 - 8 g dried leaves, 1 to 3 times per day and not to exceed 20.8 % oleuropein [Source note 20].
Note: For standardized extracts, as evidence mainly supports the quantity crude equivalent of olive leaves, both the quantity crude equivalent and the maximum concentration of the potency constituent must be met.
How is it used?
Take with food [Source note 21].
How long is it used?
Diuretic
For occasional use only [Source note 22].
Warnings and precautions
All products
Ask a healthcare professional before use if you pregnant or breastfeeding [Source note 23].
Ask a healthcare professional before use if you have a kidney disorder [Source note 24].
Ask a healthcare professional before use if you are taking other diuretics [Source note 25].
When should it be avoided?
The reference does not require an additional label statement in this section. This does not establish an absence of risk.
Possible side effects
All products except those making a diuretic claim
When using this product diuretic effect may occur.
Storage
Must be established in accordance with the requirements described in the applicable product regulations.
Preparation details
Ingredient identity, preparation requirements, and other details that define the scope of this guide.
Ingredients and preparations
| Proper name(s) | Common name(s) | Source information / Source material(s) | Source information / Part(s) | Source information / Preparation(s) |
|---|---|---|---|---|
| Olea europaea | Olive leaf | Olea europaea | Leaf |
|
References: Proper name: USDA 2024; Common name: USDA 2024; EMA 2017; Source information: EMA 2017; Jemai et al. 2009.
Other ingredients
Must be chosen from the current source ingredient database and must meet the limitations outlined in the database.
Preparation and quality requirements
The finished product specifications must be established in accordance with the requirements described in the source authority source’s product quality guidance.
The active ingredient must comply with the requirements outlined in the source ingredient database.
Guide change history
Updates to this SupplementSafety.org guide.
Minor updates
Updated guide wording, organization, and source presentation. Added our editorial change history.
Initial release
Initial SupplementSafety.org guide prepared from source reference material.
Validation: Not yet completed. Editorial updates do not constitute clinical validation.
Sources
Source information
This guide organizes source material about uses, preparations, amounts, and precautions. Read the conditions alongside each statement; the information may apply only to particular preparations or populations.
The source document includes supporting references. We have not independently summarized or assessed every cited study for this guide.
- Source document version
- December 19, 2025
- Source captured
- Aug 15, 2026
- Editorial work
- Editorial preparation. Independent clinical review has not been recorded for this guide.
Full citations are available through the link above. Verification is required to open them; reading this guide does not require verification.
Taking a medication too?
Explore our supplement–medication interaction checker. Its coverage and review status are shown with the results; a missing finding does not establish that a combination is safe.