How does caffeine react to race horse?

Caffeine acts as a stimulant in racehorses, enhancing their performance by increasing alertness and reducing fatigue. It can improve endurance and speed, making it appealing for competitive racing. However, the use of caffeine in racehorses is strictly regulated by racing authorities due to concerns about fairness and animal welfare, as it may lead to an unfair advantage. Additionally, excessive caffeine can pose health risks to the horses.