Qualia Focus contains 100 mg of caffeine in the recommended 2 capsules serving size. Caffeine, especially when used prior to exercise, is very commonly dosed based on body weight in clinical studies. However, because the amount of caffeine contained in a 2-capsule dose would be in the range of what’s been used in studies even in persons with low body weights, we would not consider bodyweight to be particularly important for dosing Qualia Focus. That said, it’s fine to choose to take only a 1 capsule dose of Qualia Focus for any reason, including if a person weighs less.