A performance enhancer, often referred to as a booster, is a substance or method used to improve physical or mental capabilities. These can include dietary supplements, medications, or training techniques that aim to increase strength, endurance, focus, or overall performance in various activities, such as sports or academics. Common examples of performance enhancers include steroids, caffeine, and creatine. While some boosters are legal and widely accepted, others may be banned in competitive sports due to ethical concerns and potential health risks. It's essential to understand the implications and regulations surrounding their use.