Most pre-workout supplements are considered safe for many adults, but they are not essential for health or exercise performance. Their ingredient mixes vary widely by brand. Ingredients like caffeine, ...

In general, pre-workout supplements provide specific compounds and nutrients that serve to enhance your workout results. These range from stimulants for improved energy levels to other agents that ...

If you’re training intensely and could do with a little extra energy at the gym, then a pre-workout could be for you. Consider it a bookend to a post-workout protein shake — it’s a supplement that ...