Best Olive Leaf Extract Supplements (2026)
Olive leaf extract is one of the most potent antioxidant supplements available, containing oleuropein and hydroxytyrosol — two polyphenols linked to cardiovascular health, immune support, and healthy aging. Derived from the leaves of the olive tree (Olea europaea), these supplements deliver the protective compounds of the Mediterranean diet in a concentrated capsule form.
Quick Comparison
| Product | Key Ingredient | Form | Best For | Rating |
|---|---|---|---|---|
| Zazzee Extra Strength Olive Leaf | 40% Oleuropein (50:1 Extract) | Capsules | Best Overall | 9.5/10 |
| Healths Harmony Olive Leaf Extract | 20% Oleuropein (750mg) | Capsules | Best Value | 9.3/10 |
| Toniiq Olive Leaf Extract | 50% Oleuropein (45:1 Extract) | Capsules | Most Potent | 9.2/10 |
| NOW Foods EGCg Olive Leaf Extract | 20% Oleuropein (500mg) | Veg Capsules | Best Trusted Brand | 9.1/10 |
| Gaia Herbs Olive Leaf | 50mg Oleuropein (680mg) | Liquid Phyto-Caps | Best Liquid Capsule | 9.0/10 |
| NatureBell Olive Leaf Extract | 40% Oleuropein (50:1 Extract) | Capsules | Best Large Supply | 8.9/10 |
| Swanson Olive Leaf Extract | 20% Oleuropein (500mg) | Capsules | Best Budget Pick | 8.8/10 |
1. Zazzee Extra Strength Olive Leaf 50:1 Extract – Best Overall
- 150 CAPSULES / OUTSTANDING VALUE: Our Extra Strength Olive Leaf Extract contains 20,000 mg strength per capsule AND 150 capsules per bottle – an amazing value! A single bottle contains a 5 month supply. Compare this to other leading brands that require 2 capsules per serving, contain less than 150 capsules, and use a much less potent, non-extract powder. Our Extra Strength Olive Leaf Extract is a bargain not be found elsewhere!
- 20,000 MG STRENGTH: Each capsule contains 20,000 mg strength of Olive Leaf Extract from a potent, powerful 50:1 extract. Combine that with a minimum of 40% Oleuropein, and our Extra Strength Olive Leaf Extract is one of the strongest dosages available!
- POTENT 50:1 EXTRACT: Our Olive Leaf Extract is derived from a standardized, concentrated, potent 50:1 extract. A stronger extraction ratio means a stronger, more potent product!
- 40% OLEUROPEIN: Oleuropein is the “good stuff”, the beneficial compound in Olive Leaf that provides the desired results. Our Olive Leaf Extract has been standardized to contain a minimum of 40% Oleuropein, which is one of the highest standardization numbers available. The higher the numbers, the more potent the extract. Clearly, not all Olive Leaf is created equal!
- NATURAL, VEGAN & NON-GMO: All ingredients, including the capsule, are 100% vegan. Our Extra Strength Olive Leaf Extract does not contain any sweeteners, artificial flavors, wheat, corn, gluten, soy, milk, egg, fish, shellfish, or tree nut ingredients. Enjoy the amazing benefits of our potent Olive Leaf Extract without worrying about what else might be hiding in each capsule!
Zazzee delivers a powerhouse olive leaf formula with a 50:1 concentration ratio and 40% standardized oleuropein — one of the highest potencies on the market.
Each capsule provides the equivalent of 20,000 mg of fresh olive leaf, standardized to deliver a guaranteed 40% oleuropein content. The bottle contains 150 vegan capsules for a full 5-month supply, making the per-serving cost extremely competitive. Zazzee manufactures in a GMP-certified facility and uses 100% vegetarian, non-GMO ingredients with no artificial fillers or additives.
- Pros:
- Industry-leading 40% oleuropein standardization
- 50:1 concentrated extract for maximum potency
- 150-capsule bottle provides a 5-month supply
- Cons:
- Higher oleuropein content may cause initial digestive adjustment
- Only available in capsule form
Best for: Anyone seeking the most potent, best-value olive leaf extract with clinical-grade standardization
2. Healths Harmony Olive Leaf Extract – Best Value
- Pump Up The Positives: You’re probably already aware of the health benefits of olive oil, but it’s obviously unhealthy and impractical to ingest a bunch of oil. Now you can get those same advantages through the best non-GMO Olive Leaf capsule taken just once daily.
- Packed With Polyphenols: Our olive leaf capsules include 750mg of Olive Leaf Extract with 20% Oleuropein, the most potent component of olive bringing a myriad of health benefits. Responsibly sourced from non-GMO trees, our Olive Leaf Extract cleanly conveys the active ingredients with minimal processing.
- A Ton Of Benefits & Vegetarian: The olive has long been known as a health-giving tree. The leaves have a long history of traditional use. It’s a premium immune support supplement!
- Manufactured In The United States: We elect to manufacture at a cGMP certified facility, right here in the USA, using globally sourced ingredients. This means you can be confident that each capsule of our olive leaf supplement will contain only non-GMO vegetarian ingredients. Always consult your physician before taking this or any dietary supplement.
- Order Today: Try a full bottle of Healths Harmony Olive Leaf Extract, with 20% Oleuropein, and start reaping all the health benefits this amazing tree has to offer; click add to cart today!
Healths Harmony offers a well-balanced olive leaf formula with 750mg per capsule and 20% oleuropein at an affordable price point.
Each capsule delivers 750mg of olive leaf extract standardized to 20% oleuropein, yielding 150mg of pure oleuropein per serving. The formula uses vegetarian capsules and is manufactured in a cGMP-certified facility in the USA. A single bottle provides a 2-month supply with once-daily dosing, and the brand includes vitamin C for added antioxidant synergy. The product is vegan, non-GMO, and free from common allergens.
- Pros:
- Strong 750mg dose with 150mg oleuropein per capsule
- Manufactured in a USA cGMP-certified facility
- Added vitamin C for enhanced antioxidant support
- Cons:
- Lower concentration ratio than 50:1 extracts
- Capsule size may be large for some users
Best for: Budget-conscious buyers who want effective olive leaf support at a great price
3. Toniiq Olive Leaf Extract – Most Potent
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Toniiq pushes olive leaf potency to the extreme with a 50% oleuropein standardization — the highest purity available in a standalone olive leaf supplement.
Using an advanced 45:1 extraction process, Toniiq achieves a tested purity of 50% oleuropein per capsule. Each bottle contains 120 capsules, and every batch undergoes third-party laboratory testing for purity and potency verification. The formula contains no fillers, binders, or artificial ingredients. Toniiq is known for its ultra-concentrated approach across multiple supplement categories, and this olive leaf extract is no exception.
- Pros:
- Highest oleuropein concentration at 50%
- Third-party lab tested for verified potency
- Clean formula with no fillers or artificial additives
- Cons:
- Premium price for the ultra-high potency
- Smaller capsule count than some competitors
Best for: Biohackers and health enthusiasts seeking the most concentrated olive leaf extract available
4. NOW Foods Olive Leaf Extract – Best Trusted Brand
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NOW Foods brings their decades of supplement manufacturing expertise to a reliable, no-frills olive leaf extract backed by rigorous GMP quality assurance.
Each vegetarian capsule contains 500mg of olive leaf extract standardized to 18% oleuropein. NOW Foods holds an NPA A-rated GMP certification, meaning every aspect of production — from sourcing to testing — meets strict quality control standards. The product is Non-GMO Project Verified, vegan, and soy-free. With 120 capsules per bottle, it provides a 2-month supply at standard dosing.
- Pros:
- NPA A-rated GMP certified manufacturing
- Non-GMO Project Verified
- Family-owned company with 55+ years of supplement experience
- Cons:
- Lower oleuropein percentage than concentrated extracts
- Requires two capsules daily for higher doses
Best for: Consumers who prioritize brand trust, verified manufacturing quality, and clean ingredients
5. Gaia Herbs Olive Leaf – Best Liquid Capsule
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Gaia Herbs uses their signature liquid Phyto-Caps technology to deliver a highly bioavailable olive leaf extract grown on their own Certified Organic farm.
Each liquid capsule provides 680mg of olive leaf extract with 50mg of standardized oleuropein. Gaia Herbs grows their olive leaf on their own farm in North Carolina and uses a proprietary liquid extraction process that preserves the full spectrum of plant compounds. The Phyto-Caps format offers faster absorption than standard dry capsules. Each bottle contains 120 capsules, and the product is vegan and free from artificial fillers.
- Pros:
- Liquid Phyto-Cap format for enhanced absorption
- Farm-grown ingredients with full traceability
- Full-spectrum extraction preserves synergistic compounds
- Cons:
- Higher price per serving than dry capsule options
- Lower oleuropein concentration per capsule
Best for: Those who want a premium, farm-sourced olive leaf with superior bioavailability
6. NatureBell Olive Leaf Extract – Best Large Supply
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NatureBell packs serious value into their olive leaf formula with 240 capsules per bottle and a concentrated 50:1 extract delivering 40% active oleuropein.
Each capsule provides the equivalent of 30,000mg of fresh olive leaf through a 50:1 concentration, standardized to 40% oleuropein. The 240-capsule bottle offers an 8-month supply at standard dosing. NatureBell manufactures in the USA and subjects every batch to third-party testing. The formula is free from soy, dairy, gluten, and artificial additives.
- Pros:
- 240 capsules provides up to 8 months of supply
- High 40% oleuropein standardization
- Third-party tested and USA manufactured
- Cons:
- Large bottle may not be ideal for first-time users
- Standard capsule format only
Best for: Long-term users who want maximum supply at the best per-capsule price
7. Swanson Olive Leaf Extract – Best Budget Pick
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Swanson delivers a clean, straightforward olive leaf extract at one of the lowest price points in the category — ideal for daily maintenance dosing.
Each capsule contains 500mg of olive leaf extract standardized to 20% oleuropein, yielding 100mg of oleuropein per serving. Swanson has been manufacturing supplements since 1969 and maintains strict quality control at their GMP-registered facility. The 120-capsule bottle lasts 2 months with twice-daily dosing. The product is non-GMO, gluten-free, and contains no sugar, salt, soy, corn, dairy, or artificial ingredients.
- Pros:
- One of the most affordable olive leaf options
- Established brand with 55+ years of manufacturing experience
- Clean ingredient profile with no common allergens
- Cons:
- Lower concentration than premium extracts
- Standard potency may require multiple capsules for therapeutic dosing
Best for: Budget-minded users seeking a reliable daily olive leaf supplement from a trusted brand
8. Carlyle Olive Leaf Extract – Best High-Dose Option
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Carlyle offers a high-potency 9,000mg equivalent olive leaf extract in a convenient once-daily capsule format at a competitive price.
Each capsule delivers a concentrated dose equivalent to 9,000mg of olive leaf, using an advanced extraction process to retain maximum active compounds. The 100-capsule bottle provides over 3 months of supply. Carlyle manufactures under strict quality standards and ensures their products are non-GMO, gluten-free, and free from artificial preservatives. The formula uses vegetarian-friendly capsules.
- Pros:
- High 9,000mg equivalent strength per capsule
- Convenient once-daily dosing
- Affordable price for the potency delivered
- Cons:
- Less transparent standardization details than some brands
- Smaller capsule count than budget options
Best for: Users who want a high-potency olive leaf extract without taking multiple capsules
9. BergaMet Citrus Bergamot with Olive Leaf – Best Combo Formula
- 80% POLYPHENOL PATENTED EXTRACTION: BergaMet’s patented extraction process compresses polyphenol-enriched powder into the maximum dosage and extract concentrations. Our formula has been clinically tested to contain over 80% polyphenols and is the only bergamot extract approved by Accademia del Bergamotto in Calabria, Italy.
- CITRUS SUPERFRUIT FORMULA: BergaMet PRO+ helps maintain optimal circulation and is a natural and effective way to support overall health - just 3 capsules a day can give you peace of mind.
- HAND PICKED IN CALABRIA, ITALY: Our Citrus Bergamot is hand-picked in Calabria Italy and processed at our patented extraction facility to ensure maximum purity and potency. Made and tested in a fully certified facility right here in the USA.
- EASY ON YOU: A fully organic, vegan friendly, diary, gluten, soy and GMO-free formula. Our Citrus Bergamot does not contain any sweeteners, artificial flavors, wheat, corn, gluten, soy, milk, egg, fish, shellfish, or tree nut ingredients.
BergaMet combines olive leaf extract with their signature 200:1 citrus bergamot extract for a dual-action cardiovascular support formula backed by clinical studies.
This premium formula pairs olive leaf extract with 1,350mg of citrus bergamot standardized to 80% polyphenols and 47% BPF (Bergamot Polyphenolic Fraction). The combination targets multiple cardiovascular markers simultaneously — olive leaf for blood pressure and antioxidant support, and bergamot for cholesterol and metabolic health. Each bottle contains 90 capsules for a 30-day supply. BergaMet is backed by over 15 published clinical studies on their bergamot extract and manufactures in the USA.
- Pros:
- Synergistic olive leaf + citrus bergamot combination
- Backed by 15+ published clinical studies
- 80% polyphenol standardization on bergamot extract
- Cons:
- Premium price reflects the combination formula
- Olive leaf is a secondary ingredient rather than the primary focus
Best for: Those seeking comprehensive cardiovascular support through a clinically studied combination formula
How to Choose the Best Olive Leaf Extract
The most important factor when selecting an olive leaf extract is the oleuropein content. Oleuropein is the primary bioactive compound responsible for the cardiovascular, immune, and antioxidant benefits associated with olive leaf. Look for products standardized to at least 20% oleuropein, with premium options offering 40-50% standardization. The higher the oleuropein percentage, the more potent the extract per capsule.
Concentration ratio matters significantly in olive leaf supplements. A 50:1 extract means 50 parts of raw olive leaf were used to produce 1 part of extract, resulting in a far more concentrated product than a simple ground leaf powder. Extracts in the 20:1 to 50:1 range deliver the most therapeutic value per capsule and are generally preferred over non-concentrated whole leaf products.
Recommended daily intake of olive leaf extract typically ranges from 500mg to 1,000mg of standardized extract. For cardiovascular support, research has used doses providing 150-500mg of oleuropein daily. For immune support, lower doses of 100-200mg oleuropein daily are commonly used. Start with a lower dose and gradually increase to assess tolerance, as some people experience mild digestive effects or detox-like symptoms during the initial adjustment period.
Some newer products also standardize for hydroxytyrosol, another powerful olive polyphenol with exceptional antioxidant capacity. Research suggests hydroxytyrosol may be even more potent than oleuropein for certain cardiovascular and anti-inflammatory benefits. Full-spectrum extracts that preserve both oleuropein and hydroxytyrosol offer the most comprehensive olive leaf benefits.
Quality certifications add an extra layer of assurance. Look for GMP-certified manufacturing, third-party testing, Non-GMO Project Verification, and clear labeling of oleuropein content. Products manufactured in the USA, UK, or EU generally adhere to stricter quality standards. Avoid supplements with unnecessary fillers, artificial colors, or proprietary blends that hide individual ingredient amounts.
Frequently Asked Questions
What is olive leaf extract and what does it do?
Olive leaf extract is a supplement derived from the leaves of the olive tree (Olea europaea). It contains powerful polyphenols, primarily oleuropein and hydroxytyrosol, which provide antioxidant, anti-inflammatory, and cardiovascular support. Research has linked olive leaf extract to benefits including healthy blood pressure maintenance, immune system support, and protection against oxidative stress.
How much olive leaf extract should I take daily?
Most studies use doses ranging from 500mg to 1,000mg of standardized olive leaf extract daily, providing roughly 150-500mg of oleuropein. Standard-potency products typically recommend 500mg twice daily, while concentrated 50:1 extracts may only require one capsule per day. Follow the manufacturer’s dosing instructions and consult a healthcare provider for personalized guidance.
When is the best time to take olive leaf extract?
Olive leaf extract can be taken at any time of day, but taking it with meals helps improve absorption and reduces the chance of stomach discomfort. Splitting the dose between morning and evening meals can maintain steadier levels of oleuropein throughout the day. Consistency matters more than timing for long-term benefits.
Are there any side effects of olive leaf extract?
Olive leaf extract is generally well tolerated. Some people may experience mild digestive discomfort, headache, or muscle aches during the first few days of use — often attributed to a detoxification response as the body adjusts. Those taking blood pressure or blood sugar medications should consult their healthcare provider, as olive leaf may enhance the effects of these drugs.
Can I take olive leaf extract with other supplements?
Olive leaf extract pairs well with most supplements, including vitamin C, omega-3 fatty acids, and other antioxidants. It can complement CoQ10 for cardiovascular support or zinc and vitamin D for immune health. However, exercise caution when combining it with blood pressure-lowering or blood sugar-lowering supplements, as effects may be additive.
How long does it take for olive leaf extract to work?
Some users report increased energy and improved well-being within the first week of consistent use. Cardiovascular and immune benefits typically become more noticeable after 4-8 weeks of daily supplementation. For blood pressure and cholesterol-related benefits, clinical studies generally assess outcomes over 8-12 weeks of continuous use.
