The claimEvidence B · meta-analysis
Energy drink + coffee is stronger
The evidence
300-400 mg caffeine + sugar + taurine + guarana → FDA MedWatch has repeatedly logged acute arrhythmia and hypertension events.
The mechanism, in brief
You don't feel sleepy because adenosine is blocked, not because caffeine itself energises you.
Sources (2)
- Wesensten, N. J., Belenky, G., Kautz, M. A., Thorne, D. R., Reichardt, R. M., & Balkin, T. J. (2002). Maintaining alertness and performance during sleep deprivation: modafinil versus caffeine. Psychopharmacology, 159(3), 238–247.
- EFSA Panel on Dietetic Products, Nutrition and Allergies. (2015). Scientific opinion on the safety of caffeine. EFSA Journal, 13(5), 4102.