Here’s what to know.Reviewed by Dietitian Jessica Ball, M.S., RDCredit: Design elements: Getty Images. EatingWell design.Key PointsResearchers linked energy drinks to serious heart events in adults ages 18 to 34.High caffeine levels in energy drinks may increase the risk of cardiac arrest.Moderation is key: track your caffeine intake and watch for symptoms like chest pain.Energy drinks have become a routine part of life for millions of people. T…