8 Serious Side Effects of Pre-Workout Supplements

Key Takeaways

Pre-workout supplements can give you energy but may cause jitters or nausea, with side effects depending on the ingredients and dosage.

Choose stimulant-free options or smaller doses to reduce risks.

Talk to a healthcare provider before using pre-workout supplements if you have heart or blood pressure problems.

Pre-workout supplements can sharpen focus, ignite energy, and delay fatigue. However, they can also cause unwanted side effects ranging from mild jitters to serious reactions.

1. Jitters

Many people feel shaky, restless, or jittery after taking pre-workout supplements . This effect can make it hard to concentrate or perform controlled movements without twitching.

The main culprits are caffeine anhydrous, synephrine (bitter orange extract), and theacrine, which