Home Ingredients Oli-Ola® (Olive Fruit Extract)
Antioxidant

Oli-Ola® (Olive Fruit Extract)

Olea europaea
Evidence Level
Limited
1 Clinical Trial
3 Documented Benefits
2/5 Evidence Score

Oli-Ola® is an olive (Olea europaea) fruit extract rich in hydroxytyrosol, one of the olive's most studied polyphenols. Taken by mouth, its best-supported role is antioxidant: EFSA has authorised the claim that olive oil polyphenols contribute to the protection of blood lipids from oxidative stress at an intake providing 5 mg of hydroxytyrosol and its derivatives per day. Broader cardiovascular and metabolic effects remain unproven for this extract.

Studied Dose Commonly 250 to 1000 mg of olive extract per day. What matters for the authorised antioxidant claim is hydroxytyrosol content rather than milligrams of extract: EFSA keys the blood-lipid-protection claim to an intake providing 5 mg of hydroxytyrosol and its derivatives per day, so check the label for standardized hydroxytyrosol. No trial of this branded olive fruit extract is cited on this page; the trial cited below used an olive leaf extract at 500 mg/day.
Active Compound Olive (Olea europaea) fruit polyphenols, principally hydroxytyrosol, with smaller amounts of oleuropein and tyrosol. Check the label for standardized hydroxytyrosol content.

Benefits

Cardiovascular research — mechanism, not a demonstrated outcome

Olive polyphenols such as oleuropein and hydroxytyrosol are a well-characterized class within the Mediterranean-diet literature, and laboratory and animal work describes effects on vascular tone and endothelial signaling. That is mechanistic background rather than a demonstrated outcome for this ingredient: the only clinical trial cited on this page (olive leaf extract, 500 mg/day, 8 weeks, n=74) found no significant effect on blood pressure versus placebo. No trial of this branded olive fruit extract is cited here.

Supported by Trial 1

Antioxidant defense

Hydroxytyrosol and oleuropein are polyphenol antioxidants. This is the one use with authorised human backing: EFSA permits the claim that olive oil polyphenols contribute to the protection of blood lipids from oxidative stress, at an intake providing 5 mg of hydroxytyrosol and its derivatives per day. The claim is about protecting LDL particles from oxidative damage; it does not mean the extract lowers cholesterol.

Supported by Trial 1

Metabolic markers — research interest, not a demonstrated effect

Olive polyphenols have been investigated for effects on blood-sugar and lipid markers, but the human data cited on this page do not show such effects: the one published trial (olive leaf extract, 500 mg/day, 8 weeks, n=74) reported no significant change versus placebo in glucose, insulin, total cholesterol, triglycerides, HDL or LDL. This remains an area of research interest rather than a demonstrated benefit.

Supported by Trial 1

Mechanism of action

1

Olive polyphenol action

In laboratory and animal studies, oleuropein and hydroxytyrosol interact with nitric-oxide signaling in blood vessels and act as direct antioxidants. The antioxidant role is the part with human backing (EFSA claim for protection of blood lipids from oxidative stress); the vascular-relaxation pathway is preclinical and has not translated into a measured blood-pressure effect in the trial cited on this page.

2

Anti-inflammatory action

Cell and animal studies report that olive polyphenols reduce markers of oxidative and inflammatory stress in vascular and other tissues. Human confirmation for this extract is lacking; the trial cited on this page did not find changes in the cardiovascular markers it measured.

Clinical trials

1
Olive Leaf Extract and Cardiovascular Markers — RCT (null result; leaf extract, not this fruit extract)
PubMed

Randomized, placebo-controlled trial of an olive leaf extract, 500 mg/day for 8 weeks, on cardiovascular health markers; olive leaf extract is not the same material as the olive fruit extract this page describes. (Stevens et al. 2021, European Journal of Nutrition)

74 adults; olive leaf extract 500 mg/day versus placebo for 8 weeks.

This trial was null: olive leaf extract did not differ significantly from placebo on any measured outcome, including total cholesterol, triglycerides, HDL, LDL, oxidized LDL, blood pressure, glucose, insulin and liver function (all p>0.05). Two points matter for this page: the material tested was an olive leaf extract rather than the olive fruit extract described here, and a null result cannot be presented as support for cardiovascular benefit.

Side effects and drug interactions

Common Potential side effects

Generally well-tolerated in the short-term studies available. Safety data specific to this branded olive fruit extract have not been published; olive polyphenols have a long history of dietary use, but that is not the same as trial-based safety data for a concentrated extract.
Mild digestive upset is occasionally reported.
Discontinue if any unusual reaction occurs. Safety in pregnancy and breastfeeding has not been established for concentrated olive polyphenol extracts, which are not equivalent to culinary olive or olive oil intake. If you are pregnant, nursing, or taking prescription medication, talk to your healthcare provider first.

Important Drug interactions

Blood pressure medication — a theoretical additive effect is often mentioned for olive polyphenols, but the one published trial of an olive extract found no significant change in blood pressure versus placebo. Treat this as a precaution rather than a documented interaction, and tell your doctor if you take blood pressure medication.
Diabetes medication — a blood-sugar-lowering effect has been proposed for olive polyphenols, but glucose and insulin were unchanged versus placebo in the trial cited on this page. Monitoring is a sensible precaution, not a response to a demonstrated interaction; tell your doctor if you take diabetes medication.
Tell your doctor if you take cardiovascular medication.

More Antioxidant Ingredients

Antioxidant
Green Tea
Green tea extract, derived from Camellia sinensis leaves, is rich in antioxidants like cat…
Antioxidant
NAC (N-Acetylcysteine)
NAC (N-Acetyl Cysteine) is a supplemental form of the amino acid cysteine, best known for…
Antioxidant
Lutein
Lutein is a yellow carotenoid antioxidant that plays a key role in eye health, particularl…
Antioxidant
Vitamin E
Vitamin E is a family of fat-soluble antioxidants, the most active being alpha-tocopherol,…

Explore Other Ingredients

Cognitive
Ashwagandha
Ashwagandha (Withania somnifera) is an adaptogenic herb from Ayurvedic tradition, widely u…
Cognitive
Holy Basil (Tulsi)
Holy basil (tulsi) is a revered adaptogenic herb in Ayurvedic tradition, used to help the…
Cognitive
Suntheanine®
Suntheanine® is a patented, 100% pure L-isomer theanine produced via an enzymatic process…

Frequently asked questions about Oli-Ola® (Olive Fruit Extract)

What is Oli-Ola?

Oli-Ola® is an olive (Olea europaea) fruit extract rich in hydroxytyrosol, one of the olive's most studied polyphenols. Taken by mouth, its best-supported role is antioxidant: EFSA has authorised the claim that olive oil polyphenols contribute to the protection of blood lipids from oxidative stress at an intake providi…

What is Oli-Ola used for?

Oli-Ola is researched primarily for Antioxidant. Olive polyphenols such as oleuropein and hydroxytyrosol are a well-characterized class within the Mediterranean-diet literature, and laboratory and animal work describes effects on vascular tone and endothelial signaling.

What is the recommended dosage of Oli-Ola?

The clinically studied dose is Commonly 250 to 1000 mg of olive extract per day. What matters for the authorised antioxidant claim is hydroxytyrosol content rather than milligrams of extract: EFSA keys the blood-lipid-protection claim to an intake providing 5 mg of hydroxytyrosol and its de… Always follow the product label and check with a healthcare provider for personal advice.

Is Oli-Ola safe, and does it have side effects?

For most healthy adults, Oli-Ola is well tolerated at studied doses. Reported effects can include: Generally well-tolerated in the short-term studies available. Safety data specific to this branded olive fruit extract have not been published; olive polyphenols have a long history of dietary use, but that is not the same as trial-based safety data for a concentrated extract. It may also interact with some medications. Oli-Ola is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does Oli-Ola interact with any medications?

Possible interactions include: Blood pressure medication — a theoretical additive effect is often mentioned for olive polyphenols, but the one published trial of an olive extract found no significant change in blood pressure versus placebo. If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for Oli-Ola?

NutraSmarts rates the evidence for Oli-Ola as Limited (2 out of 5). It is backed by 1 clinical trial and 2 cited references summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(2 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Stevens Y, Winkens B, Jonkers D, et al. The effect of olive leaf extract on cardiovascular health markers: a randomized placebo-controlled clinical trial. Eur J Nutr. 2021;60(4):2111-2120..PubMedUsed to support: Randomized placebo-controlled trial of an olive leaf extract (500 mg/day, 8 weeks, n=74). The result was null: no significant difference from placebo on cholesterol, triglycerides, HDL, LDL, oxidized LDL, blood pressure, glucose, insulin or liver function. It is cited here for transparency about the state of the evidence, not as support for benefit, and it does not test this olive fruit extract.
  2. EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA) Scientific Opinion on the substantiation of health claims related to polyphenols in olive and protection of LDL particles from oxidative damage EFSA Journal. 2011;EFSA Journal 2011;9(4):2033; claim authorised by Commission Regulation (EU) No 432/2012.Used to support: The regulatory basis for the one claim on this page with authorised human backing: olive oil polyphenols contribute to the protection of blood lipids from oxidative stress, at an intake providing 5 mg of hydroxytyrosol and its derivatives per day. It covers protection of LDL particles from oxidative damage only, and does not support blood-pressure, blood-sugar or cholesterol-lowering claims.