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In clinical studies, it has been found to increase strength and help people produce more explosive movements at the gym

If you're seeking a product to fuel your workouts, boost endurance or support muscle gains, understanding these key factors can simplify your decision: Caffeine content "Caffeine levels in pre-workout supplements will often vary somewhere between 100 to 300 mg per serving, which is equivalent to roughly one to three cups of coffee," explains Erik Bustillo, a registered dietitian and certified strength coach

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Nuzzo adds that increased energy and faster muscle recovery often kick in within the first month of supplementation