Pre-workout supplements, also known as “pre-workouts,” are intended to give you energy for when you exercise. The main ingredient in most of them is caffeine. These supplements often come in a pill form or a powder form, with powder being the most popular. Some of the ingredients in certain pre-workouts (read the labels) can be good for your health and your workouts. But the supplements can bring on side effects as well that you’ll need to be aware of.
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