11 Best Olive Leaf Extract Supplements In 2025

Olive leaf extract supplements could support heart health, immune function, and healthy blood pressure levels. They may also help decrease inflammation and help your body defend against harmful microbes.

However, not all olive leaf extract supplements are created equal. Some may offer high concentrations of oleuropein, while others may contain whole-leaf powders. You may also find differences in delivery formats, such as capsules, tinctures, or softgels.

In this blog, we have discussed the 11 best olive leaf extract supplements available in 2025. The review also discusses the factors on which we evaluated the olive leaf extract formulations, alongside the potential adverse effects of olive leaf extract supplements.

11 Best Olive Leaf Extract Supplements

1. Vitalité Now! Olive Leaf Extract

   

   Vitalité Now! Olive Leaf Extract may support the immune function, boost energy levels, and enhance skin radiance. As per its official site, one capsule provides 750 mg of olive leaf extract, standardized to deliver 150 mg of oleuropein (20%).

   Research highlights that oleuropein may help lower elevated blood pressure levels, support cardiovascular health, and decrease oxidative stress in the body. It also has antioxidant, anti-inflammatory, and immune-supporting properties.
   

   Pros

   • May support healthy blood pressure levels and offer antioxidant protection.
   • Could reduce fatigue and improve energy levels.
   • Offers 120 capsules per bottle, which may last up to four months.

   Cons

   • Variations in results and effectiveness.
   • May lead to temporary digestive discomfort, such as bloating or indigestion.

2. Toniiq – Olive Leaf 50%

   

   Toniiq Olive Leaf extract contains a highly concentrated formula, which may provide support for heart health, glucose metabolism, and immunity. As per the official site, one capsule may provide 500 mg of olive leaf extract, standardized to contain at least 50% oleuropein.

   According to the makers, Toniiq Olive Leaf 50% may support endurance by promoting healthy circulation and improving cardiovascular performance. It may also assist in supporting healthy glucose metabolism, which might help maintain balanced blood sugar levels.

   The makers state that Toniiq Olive Leaf 50% extract sources its olive leaves ethically from family-owned farms, ensuring responsible production practices. It also undergoes third-party testing to screen for the presence of heavy metals, contaminants, or harmful compounds in the formulation.
   

   Pros

   • The formula is concentrated 45:1, which may offer greater absorption and efficacy.
   • Comes in vegetarian-friendly capsules.
   • Might support healthy blood sugar levels and lower insulin resistance.
   • Offers free shipping on orders worth $99 or more.

   Cons

   • May negatively interact with blood-thinning medications.
   • Could trigger acid reflux or heartburn.

3. Triquetra – Total Olive Full-Spectrum Olive Extract

   

   Triquetra’s Total Olive offers a full-spectrum formula that pairs both olive leaf and olive fruit extract in a single formulation. As per the makers, Triquetra’s Total Olive Extract is sourced from organically grown olive trees in southern Spain, which ensures that the formulation contains high-quality olive polyphenols.

   According to the official site, Triquetra’s Total Olive Full-Spectrum Olive Extract contains both oleuropein and hydroxytyrosol polyphenols. Oleuropein may help support immune function, reduce inflammation, and support brain health.

   Hydroxytyrosol suppresses the release of pro-inflammatory molecules like TNF-α, IL-6, and COX-2 while activating Nrf2, a transcription factor that boosts cellular antioxidant responses. The process may reduce low-grade inflammation, which may otherwise trigger heart disease, diabetes, and autoimmune conditions.

   As per the official site, Triquetra’s Total Olive Full-Spectrum Olive Extract offers 60 capsules per bottle and costs $29.99 as part of a one-time purchase.
   

   Pros

   • Utilizes the CO₂ extraction method to preserve delicate bioactives in olive.
   • Contains bioperine to increase olive’s polyphenol uptake
   • Is free from common allergens, such as gluten, GMOs, solvents, and binders.
   • The antioxidants may help shield and repair skin cells from oxidative damage.

   Cons

   • May cause slight alterations in thyroid hormone levels.
   • Could trigger side effects like nausea, lethargy, or impaired coordination.

4. Zazzee – Extra Strength Olive Leaf Extract

   

   According to the official site, Zazzee’s Extra Strength Olive Leaf Extract provides 400 mg of olive leaf 50:1 extract per capsule. Each capsule contains the equivalent of 20,000 mg of olive leaf, containing a minimum of 40% oleuropein content. One bottle of Zazzee Extra Strength Olive Leaf Extract contains 150 vegan capsules, which may last up to a 5-month supply.

   The makers state that Zazzee Extra Strength Olive Leaf Extract is made in a cGMP-compliant facility and tested in an ISO-certified lab for purity and potency. Zazzee Extra Strength Olive Leaf Extract also offers a vegan, non-GMO, and gluten-free formula, which may be compatible with various dietary restrictions.
   

   Pros

   • Excludes common allergens, such as wheat, corn, milk, soy, and tree nuts.
   • Could support cognitive health and reduce mental fatigue.
   • Offers a full, lifetime money-back guarantee on purchases.
   • May help lower LDL (“bad”) cholesterol levels with consistent use.

   Cons

   • May cause an increase in urination frequency.
   • Overconsumption may reduce iron absorption in the body.

5. NatureBell – Olive Leaf Extract 30,000mg

   

   According to the official website, each two-capsule serving of NatureBell Olive Leaf Extract features 600 mg of olive leaf extract, standardized to a 50:1 ratio. This means that the formulation can provide the herbal equivalent of 30,000 mg of raw olive leaf per serving.

   NatureBell claims that its Olive Leaf Extract retains naturally occurring flavonoids, polyphenols (like oleuropein), and antioxidants. These beneficial compounds may support energy levels, blood circulation, immunity, and cardiovascular functioning.

   As per the official site, NatureBell Olive Leaf Extract offers 240 easy-to-swallow capsules per bottle, which may last a 4-month supply based on the recommended two-capsule serving size. The formulation is also free from common allergens, such as soy, fish, gluten, dairy, or artificial preservatives.
   

   Pros

   • It is standardized to contain ≥40% oleuropein, ensuring consistent effects.
   • May help improve blood circulation and support vascular health.
   • Could help reduce viral load in infections.
   • Offers a Certificate of Analysis to verify the third-party lab test results of each batch.

   Cons

   • May cause a significant drop in blood pressure levels.
   • You may experience a metallic or bitter taste in the mouth after consumption.

6. East Park – d-Lenolate Olive Leaf Extract

   

   East Park’s d-Lenolate Olive Leaf Extract utilizes a patented extraction process, which aims to maximize the immune-boosting potential of oleuropein. As per the makers, the formulation may help your body defend itself against microorganisms that weaken immunity, including those responsible for influenza, bacterial infections, and viral conditions (such as E. coli, herpes, etc).

   As per the official site, East Park d-Lenolate Olive Leaf Extract is available in 60-count and 180-count bottles, with each capsule delivering 500 mg of olive leaf extract. Opting for a subscription to East Park may save an extra 20% on the retail price.
   

   Pros

   • May help protect DNA integrity and aid in its repair.
   • Comes with a 90-day money-back guarantee on purchases.
   • The patented extraction process may ensure higher retention of active oleuropein.
   • Does not contain artificial colors, GMOs, or animal-derived ingredients.

   Cons

   • Might trigger mild anxiety or restlessness.
   • Could lead to muscle aches or spasms during initial use.

7. Healths Harmony – Olive Leaf Extract

   

   Olive Leaf Extract by Healths Harmony may support a healthy immune response and help reduce free radicals and oxidative stress in the body. According to the official site, one capsule of Healths Harmony Olive Leaf Extract features a 750 mg dose of olive leaf extract, standardized to contain 20% oleuropein.

   Healths Harmony Olive Leaf Extract formula also contains vitamin C. Ascorbic acid (vitamin C) may support immunity by enhancing the function of WBCs like neutrophils and lymphocytes, which could help your body eliminate pathogens more effectively. Vitamin C may also boost the production of interferons and support skin barrier integrity.
   

   Pros

   • Maintains extract purity by avoiding unnecessary additives or over-processing.
   • Has an omnichannel presence on various platforms, including Amazon, Target, and Walmart.
   • Inclusion of vitamin C may support immune and antioxidant health.
   • Comes in a compact bottle, which is convenient for travel or on-the-go use.

   Cons

   • The large capsule size may be difficult to swallow.
   • Not suitable for use during pregnancy or breastfeeding.

8. Gaia Herbs Immune Olive Leaf

   

   According to the official site, one capsule of Gaia Herbs‘ Immune Olive Leaf formulation has 680 mg of olive leaf extract, containing 50 mg of oleuropein. The formulation may help support immune resilience, especially during times of seasonal stress or increased exposure to pathogens.

   The antioxidant effects of Gaia Herbs Immune Olive Leaf Extract may support healthy blood pressure and cholesterol levels, which could support cardiovascular health. As per the makers, you should take two Gaia Herbs Immune Olive Leaf Extract capsules daily with water, preferably between meals.
   

   Pros

   • Undergoes ICP-MS testing standards to screen for heavy metals, such as arsenic, mercury, and lead.
   • Comes in convenient and easy-to-consume vegan liquid phyto‑capsules.
   • Offers a concentrated, single-herb extract to support vitality and immunity.

   Cons

   • May trigger feelings of dizziness or lightheadedness.
   • Lacks transparency when it comes to third-party testing standards.

9. Pure Encapsulations – Olive Leaf Extract

   

   Olive Leaf Extract by Pure Encapsulations aims to support immunity and promote a healthy intestinal environment. According to the official site, one capsule may provide you with 500 mg of olive leaf extract. The makers claim that the extract is standardized to contain a minimum of 15% oleuropein. The Pure Encapsulations Olive Leaf Extract comes in two bottles, which contain 60 and 120 capsules.

   Research suggests that oleuropein has natural antimicrobial effects that may selectively reduce the levels of harmful pathogens like E. coli, Candida albicans, and Clostridium difficile. Such effects could help maintain a balanced gut microbiome, which is critical for healthy digestion, nutrient absorption, and immune regulation.
   

   Pros

   • Could maintain a healthy gut microbiome and support digestion.
   • Excludes harmful additives like magnesium stearate, binders, and fillers.
   • May support recovery from strenuous exercise and promote endurance.

   Cons

   • Is comparatively more expensive than other olive leaf extract formulations.
   • May trigger side effects like vomiting or stomach ache.

10. Pure Synergy SuperPure Olive Extract

    

    Pure Synergy’s SuperPure formula comes with a full-spectrum olive extract, which is made from organic olive oil, fruit, and leaves. The blend contains various compounds like hydroxytyrosol, tyrosol, and oleuropein, which may promote cardiovascular function and delay signs of premature aging.

    According to the official site, one capsule from Pure Synergy SuperPure features 650 mg of the SuperPure olive extract blend, containing 18% oleuropein. The organic SuperPure blend may help support cognitive function and promote radiant skin.
    

    Pros

    • Comes in an amber glass bottle to ensure freshness and preserve potency.
    • Offers a USDA-certified organic formula, which may suit diverse dietary needs.
    • May support brain health and better memory retention.

    Cons

    • May cause chills or cold sensations.
    • Could temporarily impact liver enzyme activity.

11. Premier Research Labs ImmunoVen

    

    According to the official site, ImmunoVen by Premier Research Labs aims to support the body’s natural immune defenses and cardiovascular health. Its 3-capsule serving may provide you with 255 mg of olive leaf extract, standardized to contain at least 20% oleuropein. It also offers 456 mg of olea botaniblend, which is a mix of Aquamin F Mineralized Red Algae, organic cranberry fruit, organic cilantro leaf, Reishi mushroom, and turkey tail mushroom.

    Olea BotaniBlend may target different body systems to support vitality. Cranberry fruit may support cardiovascular health by providing polyphenols like proanthocyanidins, which reduce LDL oxidation, improve endothelial function, and lower inflammation. Organic cilantro leaf could aid in the removal of heavy metals and reduce oxidative load, which may protect vascular tissue and boost immune resilience.
    

    Pros

    • May help reduce oxidative stress with oleuropein and phytonutrients.
    • Could help decrease inflammation and improve immune resilience.
    • May support bone health and neuromuscular function.
    • Offers a vegan-friendly and Kosher formula.

    Cons

    • The Olea BotaniBlend does not specify the exact dose of each ingredient in the blend.
    • Consuming 3 capsules per day may be inconvenient for some consumers.

Side Effects of Olive Leaf Extract Supplements

1. Muscular Pain

   You might experience generalized muscle aches, stiffness, or a throbbing sensation, especially during the initial days of using olive leaf extract formulations. The oleuropein content in olive leaf extract supplements may interfere with mitochondrial function, the part of your cells that produces energy. When the energy production is temporarily disrupted, your muscles may not function or recover properly, resulting in soreness or fatigue.

   Olive leaf extract supplements may negatively impact tryptophan metabolism and acylcarnitine levels, both of which are essential for muscle energy and post-exercise recovery. These shifts may contribute to muscle pain, especially during periods of high physical stress.

2. Coughing

   Olive leaf extract supplements might trigger coughing if you have sensitive airways or allergies. Active compounds in olive leaf extract formulations, such as hydroxytyrosol, may irritate the lining of your throat or upper airways. They may trigger a dry cough or a throat tickle, particularly when using high doses of liquid olive leaf extracts that come into direct contact with the throat.

3. Allergic Reactions

   Although rare, allergic reactions to olive leaf extract supplements may occur, especially if you are sensitive to olive pollen or plants in the Oleaceae family (like olives, ash trees, or lilacs). Research has shown that cross-reactivity between plant pollens and botanical extracts (like olive leaf extract) may cause potential allergic reactions.

   Respiratory symptoms of allergic reaction to olive leaf extract formulations may include sneezing, nasal congestion, coughing, wheezing, and postnasal drip. In more severe cases, it may even trigger asthma-like symptoms or full-blown bronchial asthma.

   You might also experience allergic skin reactions after taking olive leaf extract supplements. These reactions are usually driven by histamine release and may include itching, rashes, hives, tingling, or swelling around the lips, face, or throat. Allergic reactions may also affect your gastrointestinal system, which could manifest as nausea, stomach cramps, vomiting, or diarrhea.

How Did We Evaluate The Best Olive Leaf Extract Supplements?

1. Price And Value

   When evaluating the best olive leaf extract supplements, the pricing of formulations in relation to quantity helped us determine and rank them based on their overall value.

   NatureBell’s Olive Leaf Extract 30,000mg is the most affordable option that, offers one bottle (240 capsules) for $21.95. It is followed by Zazzee Extra Strength Olive Leaf Extract, which costs $24.97 for one bottle that contains 150 capsules. toniiq’s Olive Leaf 50% follows closely by providing one bottle (120 capsules) for $25.97.

   Vitalité Now! Super Strength Olive Leaf Extract costs $31.90 for a bottle with 120 capsules, while Premier Research Labs’ ImmunoVen™ is priced at $28.96 for one bottle with 90 capsules. These options may offer a reasonable balance between price and quantity.

   However, some formulations land in the higher price bracket without a clear edge in capsule count or dosage. Healths Harmony Olive Leaf Extract costs $28.97 for a bottle with 60 capsules. It is followed by Gaia Herbs Immune Olive Leaf, which costs $28.34 for a 60-capsule bottle. Triquetra’s Total Olive Full-Spectrum is priced at $29.99 for one bottle with 60 capsules.

   At the premium end, East Park’s d-Lenolate Olive Leaf Extract is available at $89.95 for a bottle with 180 capsules. It is followed closely by Pure Synergy’s SuperPure Olive Extract, which is priced at $36 for a 60-capsule bottle. However, Pure Encapsulations’ Olive Leaf Extract is the most expensive formula on the list, costing $76.80 for one bottle with 120 capsules.

2. Brand Credibility

   When assessing brand credibility, we closely analyzed the ratings received by all 11 olive leaf extract supplement brands on third-party review platforms like the Better Business Bureau (BBB) and Trustpilot to gauge consumer trust and business integrity.

   East Park maintains an A+ rating on the Better Business Bureau, reflecting strong business conduct and responsiveness. Healths Harmony followed closely with an A rating from the BBB, largely due to its long-standing operation time.

   Pure Encapsulations holds an A- BBB rating, as a few complaints were filed against the brand that negatively affected its standing. Meanwhile, Premier Research Labs received an F rating on the BBB platform due to advertising-related issues, raising concerns about the brand’s trustworthiness.

   On the Trustpilot side, Toniiq was the only brand with a meaningful presence, earning a 3.8 out of 5 rating which is based on 25+ reviews. The Trustpilot reviews suggested a generally favorable customer experience, although a few customers experienced issues with canceling subscriptions and noted unexpected billing charges.

   Brands like Triquetra, Zazzee Naturals, and Pure Encapsulations had unclaimed or inactive profiles on Trustpilot, indicating limited consumer engagement.

   Other brands such as Vitalité Now!, NatureBell, Pure Synergy, and Gaia Herbs were not rated on Trustpilot and had no active BBB ratings, making it difficult to evaluate their reputations through independent consumer feedback.

3. Real Consumer Feedback

   In evaluating the best olive leaf extract supplements, we closely analyzed the customer feedback of all 11 supplements on Amazon to gain real-world insights into how each formulation performs in everyday use.

   Many consumers who tried the Vitalité Now! – Super Strength Olive Leaf Extract experienced notable relief from symptoms like fatigue, muscle tension, and joint pain. Consumers on Amazon also praised the formulation in terms of inflammation control and cardiovascular health.

   On Amazon, many customers appreciated Toniiq – Olive Leaf 50% for its high oleuropein concentration, improved energy, reduced cravings, and better immunity. However, some users experienced digestive discomfort after using the formulation.

   Consumers who tried Triquetra – Total Olive Full-Spectrum Olive Extract appreciated its gentle but effective support for immunity and inflammation, with some even noting reduced reliance on medication.

   However, a few customers did not experience any noticeable benefits despite regular use. Many customers praised Zazzee – Extra Strength Olive Leaf Extract for helping boost immunity against infections, while a few users noted its bitter taste as unpleasant.

   NatureBell – Olive Leaf Extract 30,000mg was praised by many consumers, particularly in managing cholesterol, inflammation, and immune balance. Many customers who used East Park – d-Lenolate Olive Leaf Extract noted its effectiveness in warding off infections and shortening recovery time during viral illnesses. However, one review pointed to possible interactions with thyroid health.

   Many customers noted quick relief from cold symptoms, improved sleep and blood pressure, and better energy levels after using Healths Harmony – Olive Leaf Extract. Meanwhile, consumers also appreciated the Gaia Herbs – Immune Olive Leaf for helping with blood pressure, blood sugar regulation, and immune resilience.

   Pure Encapsulations – Olive Leaf Extract appealed to many consumers, prioritizing clean labels and brand integrity. While some users described moderate results, others praised its role in easing sinus pressure and enhancing immune function. Customers also appreciated Pure Synergy – SuperPure Olive Extract for its sourcing, organic ingredients, and environmentally responsible production. However, a few reviews cited the lack of oleuropein content details and high cost as drawbacks.

   Customers who tried the Premier Research Labs – ImmunoVen™ noted improvements in energy, immune health, and cardiovascular function. However, the feedback was generally more reserved, with many valuing the brand’s purity over its clinical potency.

Frequently Asked Questions

1. Are All Olive Leaf Extract Supplements Equally Effective?
   No, the efficacy of Olive leaf extract supplements varies. Some olive leaf extract formulations utilize bioavailability enhancers like BioPerine to increase olive extract’s bioavailability, while other formulations may utilize the CO2 extraction method to support better absorption of olive extract.
2. Can Olive Leaf Extract Supplements Interact With Medications?
   Yes. Olive leaf extract supplements may negatively interact with antihypertensives, antidiabetics, and anticoagulant medications, possibly due to olive leaf extract’s blood-thinning, sugar-lowering, and vasodilatory properties.
3. Are Standardized Olive Leaf Extract Supplements Always Better?
   Not necessarily. While standardized formulations offer consistency in oleuropein content, they may lack the full range of beneficial compounds (hydroxytyrosol, flavonoids, and other biophenols) present in non-standardized supplements that contain whole-leaf olive extract.

Conclusion

Olive leaf extract supplements might help strengthen your immune system, improve endurance, and support healthy blood sugar levels. They could support brain health by protecting against oxidative stress and promoting better cognitive processing. Olive leaf extract supplements might also support your fitness goals by positively influencing fat metabolism and reducing appetite.

However, olive leaf extract supplements may trigger muscular pain, soreness, or stiffness, possibly due to their ability to alter cellular energy production. You might also experience coughing episodes, particularly if you have a sensitive throat or use liquid forms of the olive leaf extract. In rare cases, olive leaf extract formulations may trigger potential allergic reactions, such as wheezing or sneezing, skin rashes, stomach cramps, and diarrhea.

To support and possibly enhance the effects you notice from olive leaf extract, you might consider adding natural strategies like following a Mediterranean-style diet, increasing your intake of healthy fats (like extra virgin olive oil), staying hydrated, and engaging in regular physical activity. Managing stress through adequate sleep and breathing exercises could also help your body respond better to antioxidant-rich supplements like olive leaf extract.