Elite male Gaelic football players had a mean Omega-3 Index of 6.06%, below the cardioprotective threshold of 8%, and dietary intake was not significantly correlated with biological omega-3 status, though findings should be interpreted as descriptive given the small biomarker sample.
Key Findings
Results
The majority of elite Gaelic football players met European dietary guidelines for EPA+DHA intake, but supplement users were far more likely to meet the threshold than non-users.
63% (n = 48) of participants met or exceeded the European Food Safety Authority Adequate Intake (AI) of 250-500 mg/day for EPA+DHA.
Supplement users were significantly more likely to meet or exceed the AI compared with non-users (89.7% vs. 35.1%; p < 0.001).
Dietary intake was assessed using a validated food frequency questionnaire in players from nine intercounty Gaelic football teams (n = 76, mean age 24.7 ± 3.2 years).
Results
No participant in the biomarker subgroup achieved an Omega-3 Index at or above the cardioprotective threshold of 8%.
The mean Omega-3 Index (O3i) in the subgroup was 6.06 ± 0.93%.
The subgroup comprised n = 20 participants (mean age 25.6 ± 3.5 years, mean weight 88.5 ± 5.7 kg).
Biological status was assessed via dry blood spot sampling.
Zero participants achieved an O3i of ≥8%, which is considered the cardioprotective threshold.
Results
Dietary omega-3 intake was not significantly correlated with biological Omega-3 Index status in the subgroup assessed.
The Spearman correlation between dietary intake and O3i was ρ = -0.09 (95% CI [-0.51, 0.37]).
The authors noted this analysis was 'likely underpowered due to the small subsample assessed' (n = 20).
Findings on intake-status relationships are described as descriptive given the cross-sectional design and small biomarker sample.
Results
Sensory factors, cooking ability, and lack of nutritional knowledge were the primary self-reported barriers to fish consumption among players.
Sensory factors (e.g., taste, smell) were cited by 29% of participants as a barrier.
Cooking ability was reported as a barrier by 23% of participants.
Lack of knowledge on n-3PUFA was identified as a barrier by 20% of participants.
Background
This study represents the first comprehensive characterisation of omega-3 intake, supplementation practices, barriers, and biological status in elite Gaelic football players.
Players from nine intercounty Gaelic football teams participated, representing a Tier 3 elite level.
The study combined self-reported dietary assessment (food frequency questionnaire) with biological measurement (dry blood spot sampling).
The study population is described as an intermittent team sport cohort in Ireland, a group previously understudied for n-3PUFA status.
What This Means
This research suggests that elite male Gaelic football players, despite many meeting official dietary guidelines for omega-3 fatty acids on paper, have blood levels of omega-3s that fall below the threshold associated with heart health benefits. In a subgroup of 20 players who gave blood samples, the average Omega-3 Index was about 6%, and not a single player reached the 8% level considered cardioprotective. Interestingly, how much omega-3 players reported eating did not clearly match up with their actual blood levels, though the small sample size means this finding is preliminary.
The study also found that taking omega-3 supplements made a big difference in whether players hit dietary intake targets — nearly 90% of supplement users met the guidelines compared to only 35% of non-users. Players who did not eat much fish cited reasons like not liking the taste or smell, not knowing how to cook it, and simply not knowing enough about why omega-3s matter.
This research suggests that simply telling athletes to eat more fish may not be enough, and that targeted education — addressing cooking skills, taste preferences, and awareness of omega-3 benefits — along with guidance on supplementation, may be needed to improve omega-3 status in this population. Because the study was cross-sectional and the blood sample group was small, the authors caution that findings should be treated as descriptive rather than definitive, and further research with larger samples is needed to understand what these omega-3 levels mean for athletic performance and recovery.
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Flanagan M, Ryan L. (2026). Dietary Omega-3 Intake, Supplement Use and Omega-3 Status in Elite (Tier 3) Male Gaelic Football Players: A Cross-Sectional Study.. Nutrients. https://doi.org/10.3390/nu18193261