Enriched Eggs as a Sustainable Approach to Enhance Omega-3 Status in Elite Athletes

NCT ID: NCT07276113

Last Updated: 2025-12-10

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 17 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2023-09-25
• Study Completion Date: 2024-12-31

Brief Summary

The study looked to identify the benefit of omega-3 enriched eggs on circulating omega-3 fatty acid profile of elite level athletes

Detailed Description

Study hypothesis: Consuming omega-3 enriched eggs (compared to control) will (1) increase omega-3 index whilst also (2) improving subjective markers of recovery and other health parameters.

Aims & objective:

Overall aim: To investigate the impact of consuming omega-3 enriched eggs blood fatty acid profile among elite level athletes who do not reach omega-3 index targets of 8%, compared to control. Secondary data collected will analyse the impact on health and recovery parameters.

Primary objective: To assess the effect of consuming omega-3 enriched eggs on blood fatty acid response (omega-3 index) in elite level athletes.

Secondary objective: To assess the effect of consuming omega-3 enriched eggs on subjective recovery markers using validated questionnaires (RESTQ-Sport-36, appendix 1; Acute Recovery & Stress Scale, appendix 2) and other health parameters including resting heart rate and blood pressure.

Recruitment Participants will be recruited from Sport Ireland Institute of Sport (SII). SII are partners for this PhD and will provide access for recruitment to those teams/ athletes based in Dublin. Further recruitment will be open to teams across the island of Ireland where potential participants are competing at the highest level within that sport. All relevant permissions will be obtained before commencing any recruitment strategy. All recruitment will initially require approval from the Head of Performance for that sport, this will allow for the researcher to provide athletes with an information sheet, screening questionnaire and consent form. Secondary recruitment will be via a poster which will be put up around the campus. This recruitment will be provided approval by relevant individuals in SII and QUB. The poster will have a QR code which links the interested party to the participant information sheet and screening questionnaire.

Primary objective data collection:

Participants from both omega-3 enriched group and control group will provide a dried blood spot at week 0 (before starting intervention) and post 8-week intervention. The first step is to increase blood flow to the hands; this is done by asking the participant to wash their hands in warm water. The tip of the index finger is prepared with an antibacterial wipe, and this is allowed to dry unassisted. A lancet is then used to draw blood with the first show of blood being wiped away with gauze. The finger is gently squeezed, allowing a blood drop to form. The blood drop is allowed to drop onto the designated spot of the collection card. The collection cards are pre-treated with a proprietary antioxidant treatment called OxyStop, this prevents oxidative loss of PUFAs. The sample is allowed to dry for a few minutes before being sent the same day to a commercial laboratory for analysis (OmegaQuant, University of Stirling, GB).

Co-investigators are familiar with collecting OmegaQuant blood samples through previous professional experience.

Conditions

Suboptimal Omega-3 Index

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: OTHER
• Blinding Strategy: SINGLE

Study Groups

Intervention

omega-3 enriched egg (14 eggs weekly for 8 weeks, \~250mg DHA daily).

Group Type: EXPERIMENTAL

omega-3 enriched eggs

Intervention Type: OTHER

omega-3 enriched eggs

Control

Non enriched egg group (14 eggs per week for 8 weeks)

Group Type: PLACEBO_COMPARATOR

non-enriched eggs

Intervention Type: OTHER

non-omega-3 enriched eggs

Interventions

omega-3 enriched eggs

omega-3 enriched eggs

Intervention Type: OTHER

non-enriched eggs

non-omega-3 enriched eggs

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Participants must be elite level female athletes (tier 4 or 5)

Exclusion Criteria

• Non-smokers
• Must not be taking statins to lower LDL cholesterol levels.
• Must not have high blood pressure (systolic >140/ diastolic >90mmHg)
• Participants must remain injury free (not miss training >1week)
• Baseline omega-3 index of <8%
• Currently include eggs as part of their habitual diet.
• Participants must be willing to consume 14 eggs per week for 8 weeks.

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Queen's University, Belfast

OTHER

Sponsor Role: lead

Responsible Party

Matthew Hooks

Mr

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Anne Nugent, Doctorate

Role: PRINCIPAL_INVESTIGATOR

Queens University Belfast

Locations

Sport Ireland Institute

Dublin, Dublin, Ireland

Garvaghey Centre

Omagh, Tyrone, United Kingdom

Countries

Ireland; United Kingdom

Other Identifiers

MHLS 23_68

Identifier Type: -

Identifier Source: org_study_id