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Key points about pre-workout side effects: Caffeine related: Most pre-workout side effects are linked to high caffeine content, causing jitters, anxiety, rapid heart rate, and trouble sleeping. Dosage matters: Reducing the dosage of your pre-workout can often alleviate side effects. Ingredient sensitivity: Some individuals may be more sensitive to specific ingredients like beta-alanine, which can cause a tingling sensation. Dehydration risk: Creatine, often found in pre-workout, can draw water i