As Ryan says, “coffee is coffee is a complex mixture of chemicals” (2005). Caffeine is an effective ergogenic — something that improves athletic performance — it spares muscle glycogen and delays fatigue. For more on caffeine.Coffee also contains phytochemical compounds called chlorogenic acids, an important group of biologically active and antioxidant dietary phenols and they are antioxidants that may also decrease hunger
Chlorogenic acids have recently caught the attention of obesity researchers and dietary supplement manufacturers alike, as they can help decrease hunger.