AzTrials
AzTrials

HypertriglyceridemiaHydroxyOmegaNCT06992323

Cardiometabolic Properties of Omega-3 Functionalized With Hydroxytyrosol

A study testing EPA + HT, EPA and Sunflower Oil in people with Hypertriglyceridemia and Normal, run by National Research Council, Spain at 1 site in Spain.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
Search all trials

Trial summary

The primary aim of this study is to investigate the potential cardioprotective effects of daily nutritional doses of eicosapentaenoic acid (EPA) enriched with hydroxytyrosol (HT) on cardiovascular health, as well as its modulatory impact on the intestinal microbiota. Read more about this study

Who is it for?
Ages 18 to 70 yearsHealthy volunteers can take part
Conditions the study is for
Hypertriglyceridemia, Normal
What is being tested?
EPA + HT, EPA and Sunflower Oil
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
68 participants
Where
1 siteSpain
Study dates
17 Feb 2025to Dec 2026
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 70 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Age: 18 to 70 years old
  • Hypertriglyceridemia (150-250 mg/dl) or normal levels of triglycerides levels (<150 mg/dl)

Who cannot join

  • Presence of chronic illnesses
  • Currently undergoing pharmacological treatment
  • Smoking
  • Pregnancy
  • Adherence to a vegetarian or vegan diet

Trial locations and contacts

1 site in 1 country.

Spain1 site
  • Institute of Food Science, Food Technology and Nutrition (ICTAN), CSIC

    Madrid, Madrid, 28040

Other trials in Spain

About this study

Official title: Cardiometabolic Properties of Omega-3 Funcionalized With Hydroxytyrosol in Healthy and Cardiovascular Risk Population

The primary aim of this study is to investigate the potential cardioprotective effects of daily nutritional doses of eicosapentaenoic acid (EPA) enriched with hydroxytyrosol (HT) on cardiovascular health, as well as its modulatory impact on the intestinal microbiota. This investigation will be conducted through a randomized, double-blind, crossover, and controlled nutritional intervention trial. The study population will include two cohorts: one with normotriglyceridemic individuals, and another with hypertriglyceridemic individuals. Participants will be randomly allocated to one of three intervention groups: (1) EPA+HT supplementation, (2) EPA alone, or (3) a placebo consisting of sunflower oil devoid of EPA.

Read the detailed description

The product to be tested is a combination of two key components: an oily preparation containing 97% eicosapentaenoic acid (EPA) and a natural extract (Oleacore®) with a high hydroxytyrosol content (10%). Oleacore® is naturally derived from olives using exclusively physical and mechanical methods and is commercialized by Olivenova Health SL (https://olivenova.com/es/). The EPA-97% component is supplied by Beeps Holding GMBH (https://bepsholding.com/el-holding/?lang=es). Three types of nutraceutical formulations will be prepared, and study participants will consume three capsules daily to achieve the following dosages:

  1. 2 g of EPA + 15 mg of hydroxytyrosol (HT) (3 Type-1 capsules, EPA+HT),
  2. 2 g of EPA (3 Type-2 capsules, EPA), and
  3. 2 g of seed oil (sunflower) as a placebo (3 Type-3 capsules, Placebo).

The daily dose of 15 mg HT was selected based on the EFSA claim for the prevention of LDL oxidation , while the 2 g EPA dose was established following EFSA recommendations for triglyceride reduction.

A chronic, randomized, controlled, crossover, double-blind, free-living study design is proposed, spanning 46 weeks. Following a two-week washout period, during which the consumption of extra virgin olive oil, and olives will be restricted, participants will be grouped based on baseline characteristics (control or hypertriglyceridemia). They will then be randomized into three groups (randomization performed using SPSS software), such that one-third of participants will receive EPA+HT, another third will receive EPA without HT, and the remaining third will receive a placebo nutraceutical containing sunflower oil with no EPA or HT.

Each intervention phase will last 12 weeks. After completing one intervention, participants will undergo a four-week washout period before transitioning to the next intervention. Before the start of each phase, participants will be provided with all necessary capsules (EPA+HT, EPA, or placebo) along with detailed consumption guidelines.Volunteers will take the capsules with lunch and dinner.

Additionally, during the study, volunteers will consume a commercial olive oil with a minimal phenol content as their culinary oil. This olive oil will also be supplied by the research team for family use (1 L/2 weeks). Participants will be instructed to maintain their usual lifestyle throughout the study but will be restricted from consuming any other culinary oils apart from the one provided by the research group, as well as olives. Furthermore, the use of dietary supplements containing antioxidants, other than vitamins, will be prohibited.

Participants will attend the Human Nutrition Unit (UNH) at ICTAN-CSIC on six occasions, corresponding to the beginning and end of each intervention phase. Once eligibility has been confirmed based on the inclusion and exclusion criteria, participants will attend the UNH for signing the informed consent, receiving olive oil for household consumption, and receiving instructions to begin the study.

During visits V1-V6 (corresponding to the start and end of each intervention with the different nutraceuticals), participants will report to the UNH at ICTAN-CSIC. Upon arrival, they will provide a fasting urine sample from their first morning void and a stool sample collected within the previous 24 hours. Additionally, a trained nurse will collect a fasting blood sample (40 mL, distributed into tubes containing various anticoagulants).

Blood pressure and heart rate will also be measured. Furthermore, participants will undergo a comprehensive anthropometric and body composition assessment. Dietary habits and physical activity levels will be monitored and evaluated during these visits.

Compliance with the intervention will be monitored through monthly telephone follow-ups, the collection of unused capsules, and the measurement of specific biomarkers, including plasma phosphatidylcholine-EPA levels as a marker of omega-3 fatty acid intake and urinary HT metabolites.

Being tested
EPA + HT, EPA, Sunflower Oil
Keywords
cardiovascular risk, omega 3, hydroxytyrosol, hypertriglyceridemia
Medical subject headings
Hypertriglyceridemia

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • EPA + HTDietary supplement

    Volunteers will consume during 12 weeks 2 g/d of EPA and 15 mg/d of HT, corresponding to 3 capsules. Additionally, they will consume a commercial olive oil with a minimal phenol content as their culinary oil that will be suplied by the research team for family use (1L/2 weeks)

  • EPADietary supplement

    Volunteers will consume during 12 weeks 2 g/d of EPA corresponding to 3 capsules. Additionally, they will consume a commercial olive oil with a minimal phenol content as their culinary oil that will be suplied by the research team for family use (1L/2 weeks)

  • Sunflower OilDietary supplement

    Volunteers will consume during 12 weeks 2 g/d of Sunflower Oil, corresponding to 3 capsules. Additionally, they will consume a commercial olive oil with a minimal phenol content as their culinary oil that will be suplied by the research team for family use (1L/2 weeks)

Study groups in NCT06992323
Study groupRoleWhat they receive
EPA + HTExperimentalEPA + HT: intake of 2 g/d of EPA and 15 mg/d of HT (3 Type-1 capsules, EPA + HT)
Receives: Dietary Supplement: EPA + HT
EPAExperimentalEPA: intake of 2 g/d of EPA (3 Type-2 capsules, EPA)
Receives: Dietary Supplement: EPA
Sunflower oil (SO)Active comparatorSunflower Oil (SO): intake of 2 g/d of SO (3 Type-3 capsules, Placebo)
Receives: Dietary Supplement: Sunflower Oil

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Total cholesterol concentration

    Total cholesterol in serum samples will be determined following reference methods recommended by the Sociedad Española de Bioquímica Clínica y Patología Molecular (SEQC) using the Roche Cobas Integra 400 plus analyser (Roche Diagnostics).

    Measured: 12 months

  2. HDL-C, LDL-C, VLDL-C, and triglyceride concentrations

    Measured in serum using reference or enzymatic methods recommended by SEQC.

    Measured: 12 months

  3. Apolipoprotein A1 and B concentrations

    Measured with clinical chemistry methods based on SEQC guidelines.

    Measured: 12 months

  4. Aminotransferases: AST (ASAT) and ALT (ALAT) enzyme activity

    Measured using enzymatic methods.

    Measured: 12 months

  5. Uric acid, creatinine and glucose concentrations

    Measured using standardised spectrophotometric methods.

    Measured: 12 months

  6. Endothelial biomarkers

    VCAM-1, ICAM-1, eNOS, E-selectin, and P-selectin concentrations will be measured in serum using ELISA.

    Measured: 12 months

  7. Platelet function markers

    Leukotriene B4 and prostaglandin E2 will be measured in serum using ELISAs (Cayman kits).

    Measured: 12 months

  8. Serum cytokines (IL-6, IFN-γ, TNF-α, IL-10)

    Serum concentrations of interleukin-6 (IL-6), interferon gamma (IFN-γ), tumor necrosis factor alpha (TNF-α), and interleukin-10 (IL-10) will be determined using ELISA. These biomarkers reflect both pro- and anti-inflammatory responses.

    Measured: 12 months

  9. C-Reactive Protein (CRP)

    CRP will be measured using an automated ultrasensitive turbidimetric method (AU2700 Biochemistry analyser, Olympus).

    Measured: 12 months

  10. Oxidized LDL and 8-hydroxy-2'-deoxyguanosine (8-OHdG)

    LDLox and 8-OHdG will be measured in serum using ELISA.

    Measured: 12 months

  11. Lipid peroxidation (TBARS)

    TBARS will be measured as µM MDA equivalents using ELISA.

    Measured: 12 months

  12. TAS will be assessed using a colorimetric assay or ELISA.

    TAS will be assessed using a colorimetric assay or ELISA.

    Measured: 12 months

  13. Total oxidative status (TOS)

    TOS will be measured using ELISA.

    Measured: 12 months

  14. Antioxidant enzyme activities (NOX, GSH, GPx, SOD)

    NADPH oxidase (NOX), glutathione (GSH), glutathione peroxidase (GPx), and superoxide dismutase (SOD) will be measured using ELISA-based methods.

    Measured: 12 months

Secondary outcomes (10)
  1. Systolic and Diastolic Blood Pressure

    Systolic and diastolic blood pressure will be measured using an automatic arm sphygmomanometer (BS 150; Pic Indolor Diagnostic) at baseline and at the end of each intervention period. Measurements will be taken after the volunteer has rested on a chair for 5 minutes. Two consecutive readings will be taken on the left arm. If the values differ by more than 10-15 mmHg, a third reading will be recorded. The mean of the two (or three) closest readings will be used for analysis. Blood pressure will be expressed in mmHg..

    Measured: 12 months

  2. Resting Heart Rate

    Heart rate will be measured using the same automatic arm sphygmomanometer (BS 150; Pic Indolor Diagnostic) under the same conditions as blood pressure. Volunteers will rest for 5 minutes prior to the measurement. If multiple readings are required due to variation, the mean of the two (or three) closest values will be used. Heart rate will be expressed in beats per minute (bpm).

    Measured: 12 months

  3. Fecal Short Chain Fatty Acids (SCFAs) Concentration

    Short chain fatty acids (SCFAs) determination in faeces.The analytes will be analysed by gas chromatography system (Agilent Technologies Palo Alto, CA, USA) equipped with a mass spectrometer (MS) detector and Agilent DB-WAXtr column (100% polyethilen glycol, 60 m, 0.325 mm, 0250 um).

    Measured: 12 months

  4. Fecal Lactate Concentration

    Lactate levels in fecal samples will be measured using an Advanced Compact Ion Chromatographic instrument IC867 (Metrohm AG, Herisau, Switzerland).

    Measured: 12 months

  5. Gut Microbiota Composition (16S rRNA Gene Profiling)

    Microbial composition of fecal samples will be assessed by 16S rRNA gene amplicon sequencing. Genomic DNA will be extracted using the Quick-DNA™ Fecal/Soil Microbe Miniprep Kit (Zymo Research). Library preparation and sequencing will be conducted at Maastricht University (the Netherlands). Data analysis will be performed using the QIIME software package (v1.9.0), with taxonomic assignment based on the Greengenes database (v13.8).

    Measured: 12 months

  6. Fasting glucose

    Measured using SEQC-recommended methods.

    Measured: 12 months

  7. Fasting insulin and C-peptide

    Measured using immunoassays or ELISA.

    Measured: 12 months

  8. Glycated hemoglobin (HbA1c)

    Measured using HPLC or immunoturbidimetric methods.

    Measured: 12 months

  9. Incretins (Glucagon and GLP-1)

    Glucagon and GLP-1 concentrations will be measured using ELISA.

    Measured: 12 months

  10. Adipokines (Leptin and PAI-1)

    Leptin and plasminogen activator inhibitor-1 (PAI-1) will be measured using ELISA.

    Measured: 12 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted28 May 2025
  2. Study start17 Feb 2025
  3. Primary completionDec 2025 (estimated)
  4. Study completionDec 2026 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Crossover
Model description
Chronic, randomized, controlled, cross-over, double-blind, and free-living study
Masking
Double blind
Who is masked
Participant, Investigator
Enrolment
68 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06992323
Sponsor's protocol ID
HYDROXYOMEGA
Acronym
HydroxyOmega
Status last verified
Apr 2025
First submitted
10 Apr 2025
Last updated
28 May 2025
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A study testing EPA + HT, EPA and Sunflower Oil in people with Hypertriglyceridemia and Normal, run by National Research Council, Spain at 1 site in Spain.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 28 May 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Spain. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Total cholesterol concentration (time frame: 12 months). The study lists 14 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 May 2025.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in