Pre-workout formulas come in two forms: stimulant (stim) and non-stimulant (non-stim). The main difference between the two is that stimulant pre-workout supplements contain caffeine - one of the most widely used ways to increase focus, alertness, and energy. However, it may also result in jitters, restlessness, or sleepless nights, especially for those who might be sensitive to its side effects. So, non-stim might sound like a great alternative, but is a pre-workout any good without caffeine?
Read more to learn about the distinctions between stim and non-stim pre-workouts, the associated pros and cons, and our guidelines on how to choose the best one for you.
