ISRCTN ISRCTN11656280
DOI https://doi.org/10.1186/ISRCTN11656280
Secondary identifying numbers RHMNUT0058
Submission date
21/03/2016
Registration date
21/03/2016
Last edited
17/02/2023
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Nutritional, Metabolic, Endocrine
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data

Plain English summary of protocol

Background and study aims
Omega-3 fatty acids are essential in the diet, as the body is unable to make them itself (essential fatty acids). Although they can be found in plant sources, the most important omega-3 fatty acids are eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which are only found in certain types of fish. There are a wide variety of different omega-3 supplements of the market, which provide EPA and DHA in different forms. In this study, the appearance in the blood of EPA and DHA after taking omega-3 fats in different chemical forms will be compared. The aim of this study is to find out whether the chemical form of the supplement affects the way the fatty acids incorporate into blood fats and blood cells.

Who can participate?
Healthy men aged 18 to 45 years.

What does the study involve?
Participants are randomly allocated to five groups, who consume five different omega-3 fat supplements with a standard high fat meal in a random order. The meals are eaten on five separate study visits spaced two weeks apart. At each clinic visit, a blood sample is taken and then the participants are asked to eat the meal (and omega-3). After this, further blood samples are taken 30 minutes, one, one and a half, two, two and a half, three, four, five and six hours after finishing the meal in order to measure levels of EPA and DHA in the blood and in blood cells in order to see if there is a difference between the supplements.

What are the possible benefits and risks of participating?
There will be no immediate direct benefit to those taking part. There is a very small chance of infection and a chance of bleeding and bruising at the site of insertion of the needle for collecting the blood sample.

Where is the study run from?
University of Southampton (UK)

When is the study starting and how long is it expected to run for?
October 2009 to September 2010

Who is funding the study?
Vifor Pharma (Switzerland)

Who is the main contact?
Professor Philip Calder
pcc@soton.ac.uk

Contact information

Prof Philip Calder
Scientific

Faculty of Medicine
University of Southampton
IDS Building
MP887 Southampton General Hospital
Tremona Road
Southampton
SO16 6YD
United Kingdom

Study information

Study designRandomised blinded single-centre cross-over trial
Primary study designInterventional
Secondary study designRandomised cross over trial
Study setting(s)Hospital
Study typeOther
Participant information sheet Not available in web format, please use the contact details to request a patient information sheet
Scientific titleBioavailability and disposition of omega-3 fatty acids from different chemical forms
Study objectivesThe appearance of Eicosapentaenoic acid (EPA) and Docosahexaenoic acid (DHA) in plasma lipids and blood cells will differ according to chemical formulation of the parent oil.
Ethics approval(s)Isle of Wight, Portsmouth and South East Hampshire Research Ethics Committee, 04/02/2010, ref: 09/H0501/98
Health condition(s) or problem(s) studiedOmega-3 metabolism
InterventionParticipants will be allocated to one of the following groups:
1. Omega-3 ethyl esters
2. Omega-3 free fatty acids
3. Omega-3 triglycerides (standard formulation)
4. Omega-3 triglycerides (interesterified formulation)
5. Omega-3 triglycerides (standard formulation enterically coated)

All forms of supplement provide 1.1 g EPA plus 0.4 g DHA daily. Supplements will be taken orally immediately following consumption of a standard high fat meal. Blood samples will be immediately before the meal and at 0.5, 1, 1.5, 2, 2.5, 3, 4, 5 and 6 h after consuming the meal.

All subjects will consume all five types of supplement in random order and separated by at least two weeks.
Intervention typeSupplement
Primary outcome measureChange in EPA and DHA contents of plasma phospholipids is measured using blood testing at baseline (immediately before the meal) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5 and 6 hours after consuming the meal
Secondary outcome measures1. Change in EPA content of plasma triglycerides, cholesteryl esters and non-esterified fatty acids, and erythrocytes and mononuclear cells over 6 hours
2. Change in DHA content of plasma triglycerides, cholesteryl esters and non-esterified fatty acids, and erythrocytes and mononuclear cells over 6 hours
3. Change in blood concentrations of inflammatory markers over 6 hours

All secondary outcomes are measured using blood testing at baseline (immediately before the meal) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5 and 6 hours after consuming the meal.
Overall study start date19/10/2009
Completion date06/09/2010

Eligibility

Participant type(s)Healthy volunteer
Age groupAdult
Lower age limit18 Years
SexMale
Target number of participants10
Total final enrolment10
Key inclusion criteria1. Male
2. Aged 18 to 45 years
3. In general good health
4. Body mass index between 20 and 32 kg/m2
5. Not consuming fish oil or other oil supplements
6. Not eating more than one oily fish meal per week
7. Willing to adhere to the study protocol
8. Being able to provide written informed consent
Key exclusion criteria1. Female
2. Aged under 18 or over 45 years
3. Body mass index less than 20 or more than 32 kg/m2
4. Being diabetic (type 1 or type 2)
5. Use of prescribed medicine to control inflammation
6. Chronic gastrointestinal problems (e.g. IBD, IBS, celiac disease, cancer)
7. Participation in another clinical trial
8. Use of fish oil or other oil supplements
Date of first enrolment21/04/2010
Date of final enrolment28/04/2010

Locations

Countries of recruitment

  • England
  • United Kingdom

Study participating centre

University of Southampton
Faculty of Medicine
Southampton
SO16 6YD
United Kingdom

Sponsor information

University Hospital Southampton NHS Foundation Trust
Hospital/treatment centre

Research & Development
Southampton General Hospital
Tremona Road
Southampton
SO16 6YD
England
United Kingdom

ROR logo "ROR" https://ror.org/0485axj58

Funders

Funder type

Industry

Vifor Pharma
Private sector organisation / For-profit companies (industry)
Alternative name(s)
Vifor Pharma Management Ltd., Vifor Pharma Management AG, Vifor Pharma Management SA, Vifor Pharma Ltd.
Location
Switzerland

Results and Publications

Intention to publish date31/12/2016
Individual participant data (IPD) Intention to shareYes
IPD sharing plan summaryAvailable on request
Publication and dissemination planPlanned publication of a results paper in a peer reviewed journal.
IPD sharing planThe anonymised datasets generated during and/or analysed during the current study are available upon request from Philip Calder (pcc@soton.ac.uk).

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Results article results 01/09/2016 Yes No
Protocol file version 2 01/03/2010 16/02/2023 No No

Additional files

ISRCTN11656280_PROTOCOL_V2_01Mar10.pdf

Editorial Notes

17/02/2023: Total final enrolment and IPD sharing statement added.
16/02/2023: Protocol file uploaded (not peer reviewed).
27/04/2018: Publication reference added.