Pre-workouts are dietary supplements designed to be consumed before exercise to enhance athletic performance, improve endurance, and increase energy levels. They usually contain a combination of natural and synthetic ingredients, such as caffeine, creatine, beta-alanine, and nitric oxide boosters, that improve focus, strength, and power output.

The idea behind pre-workouts is that they can help increase blood flow, oxygen delivery, and nutrient uptake to the muscles, which can enhance exercise performance and delay fatigue. Some pre-workouts also contain additional ingredients, such as B vitamins and amino acids, that support muscle recovery and growth.