Gaia Herbs Olive Leaf Review

Olive leaf is traditionally used to help maintain the body’s natural immune defenses and promote cardiovascular health.* At Gaia Herbs, we use gentle, natural processes to extract our Olive leaf into a concentrated liquid, preserving its primary active constituent oleuropein. With 1,360 mg of Olive leaf per serving, the formula delivers 100 mg of this beneficial compound.

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Product Focus: Immune HealthAlso covers:Breathing

Tier ⓘ

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Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →

Evidence ⓘ

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How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.

Positive Reviews

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Biohacker Mentions

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Cost per month

$21

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Study, Trial or Testing Result SummaryMembersHuman studies

Each daily amount of this product gives 1,360 milligrams of olive leaf extract with 100 milligrams of oleuropein, which matches the amount used in the main study. In a nine week placebo-controlled trial of 32 school athletes, olive leaf extract with 100 milligrams of oleuropein daily did the number of breathing-related illnesses such as colds, but the athletes taking it had 28 percent sick days. …

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Review Totals and SummaryMembers2,355 reviews

2,355 reviews · Amazon 1,790 · Gaia Herbs 282 · Swanson Vitamins 279 · Walmart 4

Gaia Herbs Olive Leaf has garnered approximately 2355 ratings across various stores, with a of customers expressing . reviewers give it 4 or 5 stars, indicating a generally reception. **What it did for them** Customers report a range of from taking Gaia Herbs Olive Leaf. …

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Biohacker SummaryMembersWhat our biohacker panel says

The panel's statements here cover only oleuropein, a smaller ingredient in this product, and one spoke about the main olive leaf ingredient on its own, so there is group view on it. Of the four who mentioned oleuropein, one it for autophagy on fasting days and says it can be taken even while eating if insulin is . …

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RAL SummaryMembersThe tier and why

Both ingredients are at the studied dose, and a trial found 28 percent sick days though illnesses, with supportive but non-causal immune cell findings from an observational tea study and reviews.

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More DetailsMembersBody systems · Combine with · Possible side effects

Body systems: Immune system, Respiratory system. Combine with and possible side are for members.

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Supplement FactsOlive leaf extract 680 mg · Oleuropein 50 mg

Supplement Facts

Serving Size 1 Capsule

Servings Per Container 60

Amount Per Serving% Daily Value

Olive (Olea europaea) leaf extract	680 mg	†
Oleuropein	50 mg	†

† Daily Value not established.

Directions: Adults take 1 capsule twice daily between meals for convenient everyday use.*

Label source: the brand's label · Report a label change

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Graded October 23, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.