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6 things to know about hydroxytyrosol, olive oil's most powerful antioxidant.

When people say olive oil is good for you, hydroxytyrosol is largely the molecule they mean. It's the most-studied polyphenol in olive oil, and the only one EFSA recognizes for protecting blood lipids from oxidative stress. Olivea puts 20 mg of it into a single daily capsule.

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Olivea capsule — 20 mg of hydroxytyrosol, an olive polyphenol
Olive polyphenol research covered in:
Harvard Health PublishingYale School of Public HealthCleveland ClinicMayo ClinicAmerican College of Cardiology

  1. Meet the molecule behind olive oil's reputation.

    You've heard that olive oil is good for you. Hydroxytyrosol is a big part of the reason. It's a polyphenol concentrated in the olive fruit and, in smaller amounts, in extra virgin olive oil. When researchers study why the Mediterranean diet keeps earning its reputation, this is the compound they keep coming back to. When people talk about the health of olive oil, this is largely the molecule they mean.

    Hydroxytyrosol · the most-studied polyphenol in olive oil.

    Olivea capsule jar — concentrated olive polyphenols

  2. The word antioxidant, actually earned.

    Antioxidant gets thrown around loosely, but here it's earned. Hydroxytyrosol is unusually good at neutralizing free radicals, the unstable molecules that drive oxidative stress in your body. That radical-scavenging ability is what puts it among the most potent antioxidants found in nature, and it's the property most of its research is built on. This isn't a marketing word for this molecule. It's the mechanism.

    Hydroxytyrosol · a potent free-radical scavenger.

    Olive polyphenol oil — hydroxytyrosol neutralizing free radicals

  3. The rare antioxidant with an official health claim.

    Here's what sets it apart. Most antioxidants you see on a label have no authorized health claim behind them. Hydroxytyrosol does. EFSA, Europe's food safety authority, recognizes it for contributing to the protection of blood lipids from oxidative stress at 5 mg per day. That's a bar very few natural compounds have ever cleared, and it's why you can take this one seriously.

    EFSA Scientific Opinion 2011 · protection of blood lipids from oxidative stress.

    Olivea capsule — the EFSA-recognized olive polyphenol

  4. One of the most-researched compounds in nutrition.

    If you like to read before you buy, there's a lot here. Hydroxytyrosol and olive polyphenols appear in more than a thousand peer-reviewed papers, spanning how your arteries respond, cognition, and healthy aging. It's been examined in randomized trials, including a 2023 study of vascular function in patients with coronary artery disease. Few natural compounds have this depth of evidence behind them.

    Ikonomidis et al. · European Journal of Clinical Investigation · 2023.

    Olivea supplement facts — 20 mg hydroxytyrosol per capsule

  5. You can't realistically eat your way to a real dose.

    Knowing all this, the practical problem is dose. A daily 30 ml shot of good olive oil gives you only 1 to 3 mg of hydroxytyrosol, and matching a research-level dose from oil alone would mean drinking far more than anyone should. Your Olivea capsule concentrates 20 mg into one serving, four times the amount EFSA studied, without the calories of drinking oil.

    20 mg hydroxytyrosol per capsule · 4× the EFSA threshold.

    Olivea capsule beside an olive oil shot — 20 mg vs 1-3 mg

  6. Doctor-developed, and simple to take.

    You don't need to become a supplement expert to benefit from the research. Olivea was developed with a Harvard-trained cardiologist to deliver 20 mg of hydroxytyrosol in one small daily capsule, third-party tested every batch for purity and potency. The science is built on consistent intake, so we made it a single, easy step in your morning.

    Harvard-trained cardiologist · third-party tested · one capsule a day.

    Olivea capsule jar — 20 mg hydroxytyrosol, one a day

Olivea capsule vs. olive oil shot.

Olivea capsule
Olive oil shot (30 ml)
Hydroxytyrosol per dose
20 mg
1 – 3 mg
EFSA threshold (5 mg / day)
4× over
Rarely met
Total polyphenols per dose
36 mg
~3 mg
Calories per dose
5
~250
Daily format
1 capsule
30 ml liquid
Lab tested for potency
✓ Every batch
Rarely

Grocery-store extra virgin olive oil typically carries ~100 mg/kg total polyphenols after shelf time. Matching Olivea's 36 mg from oil alone ≈ 400 ml of oil daily (~13 shots, ~3,300 calories). Hydroxytyrosol is one specific polyphenol within that total — and the only one with an EFSA-recognized health claim for protection of blood lipids from oxidative stress. Individual oils vary.

Trusted by physicians

Recommended by doctors.

Verified clinician
Hydroxytyrosol is one of the most powerful antioxidants found in nature. Its job is to neutralize harmful molecules and curb the oxidizing of LDL cholesterol. Most people won't realistically consume enough olive oil to get a meaningful amount of hydroxytyrosol in their diet, so I love that Olivea has included such a significant dose to help fill any nutrient gaps.
Dr. Stuart Felzer, MD
Dr. Stuart Felzer, MDInternal Medicine · 44 years in practice · Verified clinician via FrontrowMD

The most-studied polyphenol in olive oil.

One Olivea capsule delivers 20 mg of hydroxytyrosol, an antioxidant backed by more than a thousand peer-reviewed studies and the only olive polyphenol with an EFSA-recognized health claim. The molecule your body has run on for thousands of years on the Mediterranean diet, in a single daily capsule.

1,000+
Peer-reviewed studies
On olive polyphenols & hydroxytyrosol
1
EFSA-recognized health claim
Rare for a natural antioxidant
20 mg
Hydroxytyrosol per Olivea capsule
4× the EFSA daily threshold
30k+
Customers in the Olivea community
4.9★ verified reviews

Individual results vary.

The product
Olivea Hydroxytyrosol Supplement
LAB ANALYSISSee 3rd party test results

Olivea Hydroxytyrosol Supplement

A clinically studied dose of the molecule recognized by EFSA, sourced from early-harvest Koroneiki olives in Messinia, Greece.

  • One of nature's most powerful antioxidants, per serving.
  • 20 mg hydroxytyrosol · 4× the EFSA daily threshold.
  • The only olive polyphenol with an EFSA-recognized health claim.
  • Lab tested for purity & potency, every batch.
  • Cap-in-cap design · EVOO + concentrated hydroxytyrosol.
THE MOST-STUDIED OLIVE POLYPHENOLFormulated with Harvard-trained cardiologists. Rooted in nature, backed by science.

The capsule-in-capsule formula

Extra Virgin Olive Oil
400 mg
Olive Fruit Extract yields 20 mg Hydroxytyrosol
200 mg
Why subscribe Hydroxytyrosol's effects have been studied with daily, consistent intake. Subscribers save up to 30%, ship free, and never run out.
Why Olivea?

Most supplements miss the molecule that matters. Your Olivea capsule gives you 20 mg of hydroxytyrosol, the polyphenol with the only EFSA-recognized health claim for protection of blood lipids from oxidative stress, suspended inside a capsule of real extra virgin olive oil your body actually absorbs.

Ingredients & sourcing

200 mg of olive fruit extract (Olea europaea) standardized to deliver 20 mg of hydroxytyrosol, suspended inside 400 mg of extra virgin olive oil — a capsule-in-capsule design that preserves the natural oil matrix the molecule needs to absorb.

Other ingredients: vegetable capsule, dextrin, silicon dioxide.

Sourced from early-harvest Koroneiki olives in Messinia, Greece.

How to take it

One capsule daily with or without food, ideally in the morning with your coffee. It's food-derived and generally well tolerated alongside everyday supplements like omega-3s and multivitamins. As with any supplement, check with your doctor before adding it to a prescription routine.

Lab analysis

Every batch is third-party tested for purity and potency. Polyphenol content is verified by HPLC; heavy metals, microbials, and pesticide residues are screened on every lot.

See the latest 3rd-party test results →

Science & certifications

EFSA-recognized health claim: 5 mg of hydroxytyrosol and derivatives per day protect LDL from oxidative damage. One capsule delivers 4× that threshold.

Mechanism backed by 1,000+ peer-reviewed studies. Vascular endpoints studied in randomized trials of patients with coronary artery disease (Ikonomidis I et al., European Journal of Clinical Investigation, 2023).

Join 30,000+ others who did their homework.

★★★★★
Douglas W. · 70s ✓
After reading the research on PubMed about the benefits of hydroxytyrosol, I chose Olivea because of the source and the delivery system.
★★★★★
Mark U. · 60s ✓
I used to take two fish oil capsules every morning. I've switched to this hydroxytyrosol supplement instead — now it's just one dose and I'm feeling great. Heart health is incredibly important to me.
★★★★★
Jaime A. ✓
The best antioxidant from olive oil in one capsule.
  • the compound
    Why hydroxytyrosol matters
  • doctor
    Dr. Joel Kahn on hydroxytyrosol
  • dose
    2,000 olives in one capsule
  • shot vs capsule
    Olive oil shot vs Olivea capsule
  • sourcing
    From early harvest, Messinia
Sabrina Avila, founder of Olivea
From the founder

Why we built Olivea.

After my father's sudden heart attack, I became obsessed with the science of olive polyphenols. Hydroxytyrosol kept coming up as the most-studied one, and the only one EFSA recognized for protecting blood lipids from oxidative stress. Olivea exists to make that molecule a daily habit, at a dose the research actually uses.
Sabrina Avila
Founder · Olivea

Common questions.

What exactly is hydroxytyrosol?

It's a polyphenol found in olives and extra virgin olive oil, and the most-studied compound behind olive oil's health research. It's a potent antioxidant, meaning it neutralizes free radicals that drive oxidative stress. It's the one olive polyphenol EFSA recognized with a health claim.

How is it different from other antioxidants?

Two ways. First, its radical-scavenging capacity is unusually high, which is why it's often called one of nature's most powerful antioxidants. Second, it's one of very few natural antioxidants with an authorized EFSA health claim, for protection of blood lipids from oxidative stress at 5 mg per day.

Can I just get it from olive oil?

You get some. A 30 ml shot of good extra virgin olive oil delivers roughly 1–3 mg of hydroxytyrosol, at ~250 calories. One Olivea capsule delivers 20 mg in a 5-calorie capsule, four times the EFSA threshold, which is difficult to reach from oil alone without drinking far too much.

Is hydroxytyrosol safe for long-term daily use?

Hydroxytyrosol is among the most well-tolerated compounds in nutrition research — it's a food-derived molecule the EFSA officially recognized as safe at therapeutic doses. Studies have followed daily supplementation for 6+ months with no reported adverse effects in healthy adults.

Why 20 mg per capsule?

The EFSA health claim is set at 5 mg of hydroxytyrosol and derivatives per day. Each capsule delivers 20 mg, four times that threshold, to give you a comfortable margin over the amount studied for protecting blood lipids from oxidative stress.

Where is it sourced?

Greece. From early-harvest Koroneiki olives in Messinia, selected for ultra-high-phenolic content. Lab tested for purity and potency, every batch.

How does subscribe & save work?

Ships every 30, 90, or 180 days depending on the plan you choose. Cancel, pause, or skip any time from your account. No commitment, no fees.

Start the daily polyphenol habit.

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Health information.

Statements in this article have not been evaluated by the Food and Drug Administration. Olivea products are not intended to diagnose, treat, cure, or prevent any disease. Consult a healthcare professional before making changes to your diet or supplement routine.

Editorial collaboration.

This article draws on the expertise of Olivea's medical advisory team. Advisors are compensated for their roles with the brand.

Research note.

Studies cited examine olive polyphenols, hydroxytyrosol, and olive oil consumption in various forms. Individual studies do not constitute clinical proof of Olivea's specific product effects.

Testimonial note.

Customer experiences reflect individual results and are not typical. Individual results vary.

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