Pre-workout Side Effects: Is It Worth Taking? If you work out, you’ve probably heard about the slew of dietary supplements designed to boost energy levels, increase athletic performance, aid exercise ...

Pre-workout' is primarily made up of ingredients like caffeine and creatine, as well as amino acids, nitric oxide agents and ...

Medically reviewed by Patricia Mikula, PharmD Key Takeaways Most pre-workout effects peak within 30-90 minutes, but caffeine ...

Creatine helps increase power and muscle growth, while pre-workout offers quick energy and focus. Learn how they differ and when each supplement makes sense for you.

The pre-workout staple, known for its itchy onset, could help you push through training sessions longer.

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