In 2025, Andrew Blannin and a team from the University of Birmingham in the UK studied 55 endurance-trained amateur men. They gave groups 3 g/day of EPA-rich fish oil (2.3 g EPA, 0.3 g DHA), DHA-rich algae oil (0.3 g EPA, 2.3 g DHA), or a placebo for 6 weeks. They tested heart rate, perceived effort, breathing ratio, and a 24 km bike time trial before and after.