Best Olive Leaf Extract Supplements (2026) – Top 10 Reviewed
Olive leaf extract has emerged as one of the most versatile supplements for cardiovascular health, immune support, and antioxidant protection. The key compound responsible for these benefits is oleuropein, a polyphenol that gives olives their characteristic bitter taste and powerful health properties.
The best olive leaf supplements deliver standardized doses of oleuropein with good bioavailability, while avoiding cheap fillers or underdosed formulas. Here are our top 10 picks for 2026.
| Product | Key Ingredients | Servings | Form | Best For |
|---|---|---|---|---|
| Zazzee Extra Strength Olive Leaf | 40% Oleuropein, 50:1 Extract | 150 | Capsules | Best Overall |
| Vitalité Now! Super Strength | 20% Oleuropein, 750mg | 60 | Capsules | Best Value |
| Toniiq Olive Leaf Extract | 50% Oleuropein, 45:1 Extract | 120 | Capsules | Best High-Potency |
| Island Nutrition Olive Leaf | 25% Oleuropein + Hydroxytyrosol | 90 | Capsules | Best Premium |
| NatureBell Olive Leaf Extract | 40% Oleuropein, 50:1 Extract | 240 | Capsules | Best Budget Option |
| Swanson Olive Leaf Extract | 20% Oleuropein, 500mg | 120 | Capsules | Best Trusted Brand |
| Gaia Herbs Olive Leaf | Liquid Phyto-Caps | 120 | Liquid Caps | Best for Absorption |
| NOW Foods Olive Leaf Extract | 6% Oleuropein, 500mg | 120 | Capsules | Best for Beginners |
| Humann SuperBerine | Berberine + Olive Leaf | 30 | Capsules | Best Combination Formula |
| BergaMet Citrus Bergamot PRO+ | Bergamot + Olive Leaf | 90 | Capsules | Best for Cholesterol Support |
1. Zazzee Extra Strength Olive Leaf – Best Overall
Why it stands out: This concentrated 50:1 extract delivers 20,000mg equivalent strength per serving with an impressive 40% oleuropein standardization. The five-month supply offers exceptional value for a premium formula.
Zazzee uses a concentrated extraction process that packs 50 times the potency of standard olive leaf powder into each capsule. Each 400mg capsule provides 160mg of pure oleuropein, which exceeds the clinically studied doses for cardiovascular and immune benefits. The formula is 100% vegetarian, non-GMO, and free from artificial additives. Third-party testing ensures consistent potency across batches, which is crucial for standardized herbal extracts.
What sets Zazzee apart is their commitment to transparency. The company clearly labels exactly how much oleuropein each serving contains, rather than hiding behind vague “proprietary blends.” The 150-capsule bottle at once-daily dosing means you won’t need to reorder for nearly half a year. The capsules are easy to swallow and don’t leave an aftertaste. For those serious about olive leaf supplementation, this formula delivers therapeutic-level dosing without requiring multiple pills.
Pros:
- Highest oleuropein content per serving in its class
- 150 capsules provides 5-month supply
- Vegan-friendly and non-GMO
- No fillers or artificial ingredients
- Clear labeling of active compound content
Cons:
- Higher price point than basic formulas
- May be more potency than casual users need
Best for: Anyone seeking maximum potency olive leaf extract with clinically relevant oleuropein levels for serious cardiovascular or immune support.
2. Vitalité Now! Super Strength Olive Leaf – Best Value
Why it stands out: This formula delivers 750mg of olive leaf extract standardized to 20% oleuropein (150mg per capsule) at an accessible price point, making it one of the best values for quality olive leaf supplementation.
The 120-count bottle provides up to four months of supplementation at the recommended one capsule daily dose. Vitalité Now! sources their olive leaf from high-quality dark leaf olive trees and manufactures in a GMP-certified facility in the USA. The vegetarian capsules are easy to swallow and well-tolerated. At 150mg of oleuropein per serving, this formula hits the sweet spot between potency and value.
What makes this supplement stand out in the crowded olive leaf market is its combination of legitimate potency and reasonable pricing. Many budget supplements skimp on oleuropein content, but Vitalité Now! delivers a full 20% standardization in each 750mg capsule. The formula has earned strong reviews from users who’ve noticed improvements in blood pressure readings and immune resilience. The company also offers a money-back guarantee, reducing the risk of trying a new supplement.
Pros:
- Excellent price-to-potency ratio
- 2-4 month supply per bottle
- Made in USA at GMP-certified facility
- Vegetarian capsules
- Money-back guarantee included
Cons:
- Lower concentration than ultra-potent formulas
- Less premium sourcing than European options
Best for: Value-conscious consumers who want effective olive leaf supplementation without premium pricing but don’t want to sacrifice quality.
3. Toniiq Olive Leaf Extract – Best High-Potency
Why it stands out: With 50% oleuropein standardization, Toniiq delivers an industry-leading 250mg of oleuropein per 500mg capsule, making it one of the most concentrated olive leaf extracts available.
Toniiq’s advanced extraction technology achieves pharmaceutical-grade purity through multiple purification stages. The 45:1 extract ratio means each capsule provides the equivalent of 22,500mg of raw olive leaf. Every batch undergoes third-party testing with certificates of analysis available. The formula is produced in a GMP-certified facility with no artificial additives or preservatives. This is the go-to choice for biohackers and those seeking maximum therapeutic dosing.
Toniiq has built their brand around “elevated” botanicals—herbs extracted to their maximum potential through cutting-edge technology. Their olive leaf undergoes proprietary purification to concentrate oleuropein while removing unwanted plant material. The result is a clean, potent extract that delivers more active compound per capsule than virtually any competitor. Users report noticeable effects on blood pressure and energy levels, likely due to the high oleuropein concentration. The 120-capsule bottle offers flexibility in dosing—you can take one capsule daily for maintenance or up to three for therapeutic applications.
Pros:
- Highest oleuropein percentage available (50%)
- Third-party tested with COA
- 120 capsules per bottle
- Clean formula with no fillers
- Flexible dosing options (1-3 daily)
Cons:
- Very high potency may be more than some need
- Premium pricing reflects quality
- May cause stronger die-off symptoms initially
Best for: Those seeking maximum strength olive leaf extract for therapeutic applications, or anyone who hasn’t responded to lower-potency formulas.
4. Island Nutrition Olive Leaf Extract – Best Premium
Why it stands out: This Spanish-sourced formula combines 25% oleuropein with a 20% hydroxytyrosol complex, offering the most comprehensive polyphenol profile among olive leaf supplements.
Island Nutrition sources exclusively from family-owned olive farms in Andalusia, Spain, the premier region for olive cultivation. Each 500mg capsule includes both olive leaf extract (25% oleuropein) and 50mg olive fruit extract (20% hydroxytyrosol complex), providing as many polyphenols as 1/3 liter of extra virgin olive oil. The traditional extraction process uses no chemical solvents, preserving the full spectrum of beneficial compounds. This is the closest you can get to Mediterranean diet benefits in supplement form.
Pros:
- Premium Spanish-sourced olives
- Includes both oleuropein and hydroxytyrosol
- Traditional, chemical-free extraction
- From established brand (since 1995)
Cons:
- Higher price than mass-market options
- 90-count bottle is smaller supply
Best for: Those who want authentic Mediterranean olive polyphenols with full-spectrum benefits.
5. NatureBell Olive Leaf Extract – Best Budget Option
Why it stands out: With 240 capsules standardized to 40% oleuropein at an affordable price, NatureBell offers unbeatable value for long-term olive leaf supplementation.
The 50:1 concentrated extract delivers 30,000mg equivalent strength per two-capsule serving. Despite the budget pricing, NatureBell doesn’t skimp on quality—the formula is non-GMO, third-party tested, and free from wheat, soy, dairy, gluten, and artificial additives. The 240-count bottle provides a four-month supply at the recommended two capsules daily. This is an excellent choice for those who want to take olive leaf extract consistently without breaking the budget.
Pros:
- Lowest cost per serving in its class
- 4-month supply per bottle
- 40% oleuropein standardization
- Non-GMO and allergen-free
Cons:
- Requires two capsules per serving
- Less premium sourcing than Spanish options
Best for: Budget-conscious consumers who want quality olive leaf extract at an accessible price.
6. Swanson Olive Leaf Extract – Best Trusted Brand
Why it stands out: Backed by over 50 years of supplement expertise, Swanson delivers consistent 20% oleuropein standardization in an affordable, well-researched formula.
Swanson has been crafting supplements since 1969, and their olive leaf extract reflects that expertise. Each 500mg capsule provides 100mg of oleuropein with consistent batch-to-batch potency. The formula is manufactured in GMP-certified facilities with third-party testing for purity and quality. The 120-capsule bottle at an accessible price point makes this an excellent choice for those new to olive leaf supplementation or looking for a reliable daily maintenance dose.
Pros:
- Trusted brand with 50+ years experience
- Consistent 20% oleuropein standardization
- GMP-certified manufacturing
- Very affordable pricing
Cons:
- Lower potency than concentrated extracts
- Uses gelatin capsules (not vegan)
Best for: Those who value brand reliability and consistent quality over maximum potency.
7. Gaia Herbs Olive Leaf – Best for Absorption
Why it stands out: Gaia’s liquid phyto-cap technology delivers olive leaf extract in a rapidly absorbing vegetable glycerin base, offering superior bioavailability compared to dry powder capsules.
Gaia Herbs has been pioneering herbal extraction for over 35 years, and their olive leaf formula reflects that expertise. The liquid phyto-cap contains olive leaf extract suspended in vegetable glycerin, which enhances absorption and allows the beneficial compounds to enter your system faster than traditional capsules. Gaia oversees every step from soil to supplement, growing many of their herbs on their own Certified Organic farm in North Carolina. The 120-count bottle provides a 60-day supply at the recommended dosage.
Pros:
- Superior absorption via liquid delivery
- Farm-to-bottle quality control
- Vegan-friendly formula
- 35+ years of herbal expertise
Cons:
- Lower oleuropein per capsule than concentrates
- Requires two capsules per serving
Best for: Those who want faster absorption and trust Gaia’s seed-to-supplement quality standards.
8. NOW Foods Olive Leaf Extract – Best for Beginners
Why it stands out: NOW’s gentle 6% oleuropein formula provides an ideal starting point for those new to olive leaf supplementation, with trusted GMP manufacturing and an affordable price.
NOW Foods has been a trusted name in supplements since 1968, and their olive leaf extract offers a well-tolerated introduction to this botanical. Each 500mg capsule provides approximately 30mg of oleuropein—enough to experience benefits while minimizing the risk of die-off reactions that can occur with higher doses. The formula is manufactured in a GMP A-rated facility with extensive quality testing. The flexible dosing (1-3 capsules daily) allows you to gradually increase as your body adjusts.
Pros:
- Gentle dosing ideal for beginners
- Trusted brand since 1968
- GMP A-rated manufacturing
- Very affordable entry point
Cons:
- Lower oleuropein than concentrated extracts
- May require multiple capsules for therapeutic doses
Best for: First-time olive leaf users or those who prefer starting with lower, gentler doses.
9. Humann SuperBerine – Best Combination Formula
Why it stands out: This innovative formula combines clinically researched berberine with olive leaf extract for synergistic support of healthy metabolism and blood sugar levels.
Humann’s SuperBerine takes a different approach by pairing olive leaf extract with berberine, another powerful plant compound with overlapping metabolic benefits. The combination targets healthy blood sugar metabolism from multiple pathways—berberine activates AMPK while olive leaf’s oleuropein supports insulin sensitivity. The high-absorbency formula uses clinically researched ingredients for maximum efficacy. While the 30-capsule count is smaller than standalone olive leaf supplements, the synergistic formula delivers more comprehensive metabolic support.
Pros:
- Synergistic berberine + olive leaf combination
- Targets metabolic health from multiple angles
- Clinically researched ingredients
- High-absorbency formula
Cons:
- Smaller bottle size (30 capsules)
- Higher price per serving
- Not for those who just want olive leaf
Best for: Those seeking comprehensive metabolic support beyond standard olive leaf benefits.
10. BergaMet Citrus Bergamot PRO+ – Best for Cholesterol Support
Why it stands out: This physician-backed formula combines 80% polyphenol citrus bergamot with olive leaf extract for targeted cardiovascular and cholesterol support backed by clinical studies.
BergaMet PRO+ pairs olive leaf extract with Bergamonte citrus bergamot, which has been shown in multiple clinical studies to support healthy cholesterol levels. The 200:1 bergamot extract delivers 1,350mg with an industry-leading 47% BPF (bergamot polyphenolic fraction). The olive leaf component adds complementary cardiovascular benefits through its own polyphenol profile. Made in the USA and backed by clinical research, this is the premium choice for those specifically targeting heart health markers.
Pros:
- Clinically studied bergamot + olive leaf combination
- 80% polyphenol content
- Doctor-formulated for cardiovascular support
- Made in USA
Cons:
- Premium pricing
- Not ideal for those seeking pure olive leaf
- Olive leaf is secondary ingredient
Best for: Those specifically targeting cholesterol and cardiovascular markers with evidence-based ingredients.
What is Olive Leaf Extract and Who Should Take It?
Olive leaf extract comes from the leaves of the olive tree (Olea europaea) and contains potent polyphenols, particularly oleuropein and hydroxytyrosol. These compounds are responsible for many of the health benefits associated with the Mediterranean diet, including support for cardiovascular health, immune function, and healthy blood pressure levels. Interestingly, olive leaves contain higher concentrations of these beneficial compounds than the olive fruit itself—dried olive leaf is approximately 6% oleuropein, while concentrated extracts can reach 40-50%.
Research has shown that olive leaf extract may help lower elevated blood pressure and cholesterol levels, support healthy blood sugar metabolism, provide antioxidant protection against oxidative stress, and support immune function during seasonal challenges. Some studies suggest it may also help maintain bone density and shorten the duration of colds, though it doesn’t appear to prevent them.
Consider olive leaf extract if you’re looking to support heart health, maintain healthy blood pressure already in the normal range, boost antioxidant protection, or strengthen immune defenses. It’s particularly popular among those who want Mediterranean diet benefits without consuming large amounts of olive oil daily. People in Mediterranean regions have historically enjoyed lower rates of heart disease, diabetes, and cognitive decline—and olive polyphenols are believed to play a significant role in these outcomes.
How to Choose the Right Olive Leaf Extract
Key Ingredients to Look For
The most important factor is oleuropein content. Clinical studies typically use extracts providing 100-136mg of oleuropein daily, which is the threshold where cardiovascular and immune benefits become measurable. Look for standardized extracts listing the oleuropein percentage—20-50% is optimal. A 20% extract at 500mg provides 100mg oleuropein, while a 40% extract at 400mg provides 160mg.
Some premium formulas also include hydroxytyrosol, another powerful olive polyphenol that offers additional cardiovascular benefits and may be better absorbed than oleuropein alone. Hydroxytyrosol has one of the highest antioxidant capacities ever measured—with an ORAC value around 40,000 µmol TE/g, far exceeding green tea or CoQ10. According to European health authorities, just 5mg of hydroxytyrosol daily provides cardiovascular benefits.
Forms Compared
Capsules are the most common and convenient form, with powder capsules and liquid phyto-caps both being effective. Standard powder capsules work well for most people, while liquid phyto-caps (like Gaia Herbs) offer faster absorption for those who want quicker effects. Liquid extracts and tinctures are another fast-absorbing option but often have a bitter taste that some find unpleasant. Gummies are available but typically contain lower doses and added sugars. For maximum potency, look for concentrated extracts with 40:1 or 50:1 ratios, which pack significantly more active compounds per serving than standard extracts.
What to Avoid
Skip products that don’t list oleuropein percentage or use vague “proprietary blends” that hide actual ingredient amounts. Avoid extracts with excessive fillers, artificial colors, or synthetic additives. Be wary of extremely cheap options that may use inferior olive leaf sources or fail to standardize for active compounds—these products often don’t contain therapeutic levels of oleuropein.
Source matters more than many people realize. Chinese-sourced olive leaf is common and inexpensive but often lower quality than Mediterranean sources. Spanish and Italian olive leaves are generally considered superior due to optimal growing conditions, traditional cultivation expertise, and established quality standards. Research has shown that extracts made from fresh olive leaves contain approximately 3.5 times more oleuropein than those made from dried leaves, so processing methods matter too.
Side Effects and Precautions
Olive leaf extract is generally well-tolerated, but some people experience temporary die-off symptoms (also called Herxheimer reactions) when starting supplementation, especially at higher doses. These symptoms—headache, fatigue, muscle aches, and flu-like feelings—occur when olive leaf’s antimicrobial compounds eliminate harmful microorganisms faster than your body can clear them. Starting with lower doses and gradually increasing over 1-2 weeks can minimize these effects. Common mild side effects include digestive upset, dizziness, and acid reflux, which typically resolve as your body adjusts.
In rare cases, allergic reactions can occur, particularly among people sensitive to olive pollen or plants in the Oleaceae family (including ash trees, jasmine, and lilacs). Symptoms may include respiratory issues like sneezing and coughing, skin reactions like itching and hives, or gastrointestinal symptoms like nausea and cramping. Discontinue use immediately if you experience any allergic symptoms.
Consult your healthcare provider before taking olive leaf extract if you’re on blood pressure medications, diabetes medications, or blood thinners, as olive leaf may enhance their effects and potentially cause blood pressure or blood sugar to drop too low. Pregnant and nursing women should avoid supplementation due to limited safety data. Those with scheduled surgery should stop taking olive leaf extract at least two weeks beforehand, as it may affect blood clotting and blood pressure during procedures.
FAQs
How much olive leaf extract should I take daily?
Most clinical studies use doses providing 100-136mg of oleuropein daily, which is the threshold for measurable cardiovascular benefits. For a 20% extract, this means 500-680mg of extract; for a 40% extract, 250-340mg. Start with the lower end and increase gradually based on your response. If you experience die-off symptoms, reduce your dose and increase more slowly.
When is the best time to take olive leaf extract?
Take olive leaf extract with food to improve absorption and reduce the chance of digestive upset. The fat content in meals helps absorb the fat-soluble polyphenols. Splitting your daily dose between morning and evening meals may provide more consistent blood levels of the active compounds throughout the day, though single daily dosing is also effective.
How long does it take to see results from olive leaf extract?
Some people notice immune support benefits within days, particularly when taking olive leaf at the onset of cold symptoms. Cardiovascular effects like blood pressure support typically take 4-8 weeks of consistent use to become noticeable. Clinical studies showing cholesterol benefits have lasted 8-12 weeks. Energy improvements and general wellness effects often appear within 2-4 weeks.
Can I take olive leaf extract with other supplements?
Olive leaf extract pairs well with most supplements. It’s often combined with berberine for metabolic support, citrus bergamot for cholesterol health, or CoQ10 for additional cardiovascular benefits. However, be cautious combining with other blood pressure or blood sugar supplements to avoid excessive effects. If you’re stacking multiple supplements affecting blood pressure, monitor your readings regularly and consult your healthcare provider.
Is olive leaf extract safe for long-term use?
Yes, olive leaf extract appears safe for long-term daily use based on available research and its long history of traditional use in Mediterranean cultures. Many people take it continuously as part of their wellness routine for years without issues. The traditional use of olive leaf in teas and foods spans thousands of years, providing reassurance about its safety profile.
Does the source of olive leaf matter?
Mediterranean-sourced olive leaf, particularly from Spain, is generally considered superior due to optimal growing conditions and established cultivation expertise. Some research suggests fresh leaf extracts retain more oleuropein than those made from dried leaves—approximately 3.5 times more in some studies. Premium brands often specify their sourcing, with Spanish and Italian origins commanding the highest regard. Chinese-sourced olive leaf, while less expensive, may have lower polyphenol content and less rigorous quality control.
Final Verdict
For most people, Zazzee Extra Strength Olive Leaf offers the best combination of potency, value, and quality with its 40% oleuropein standardization and five-month supply. The 160mg of oleuropein per capsule exceeds clinical study thresholds, ensuring you’re getting a therapeutically relevant dose with each serving.
If you’re on a tighter budget, NatureBell delivers comparable strength at a lower price point—their 240-capsule bottle with 40% oleuropein provides excellent value for long-term supplementation. For those new to olive leaf who want to start gently, NOW Foods offers a well-tolerated introduction at 6% oleuropein.
Those seeking maximum therapeutic potency should consider Toniiq’s 50% oleuropein formula—at 250mg of oleuropein per capsule, it’s the strongest option available and ideal for those who haven’t responded to standard formulas. For premium Mediterranean sourcing with a full polyphenol profile including hydroxytyrosol, Island Nutrition stands out as the authentic choice, sourcing exclusively from family-owned Spanish olive farms.
If you’re specifically targeting cholesterol or metabolic health, consider the combination formulas: Humann SuperBerine pairs olive leaf with berberine for comprehensive metabolic support, while BergaMet PRO+ combines it with clinically studied citrus bergamot for cholesterol management. Both offer synergistic benefits beyond what olive leaf provides alone.
