Multi-ingredient protocols were tested in male professional football players over two weeks to see if varying dosages improved their performance, sprint times, reaction and fatigue. As a particularly well-studied ergogenic aid, caffeine may improve physical performance and fatigue during football. Study detailsResearchers randomly allocated 97 male professional football players aged 18–35 to one of four experimental groups. The football performance was assessed using GPS-derived variables and drone video footage. Source: Nutrients doi: 10.3390/nu18162588; “Football-Specific Performance and Cognitive Fatigue Resistance Following Supplementation with Two Phosphatidylserine Doses Combined with Taurine and Caffeine in Professional Male Football Players: A Randomized, Triple-Masked, Placebo-Controlled Trial.”