1 Caffeine. In small quantities, caffeine may boost energy, alertness and athletic performance. Limit caffeine to 200 mg at a time, no more than twice a day. 2. Ginseng. There's no evidence this East Asian herb does a thing to boost energy and it's actually been shown to decrease exercise endurance. Theconsumption of energy drinks (e.g., containing caffeine and taurine) has increased over the last decade among adolescents and athletes to enhance their cognitive level and improve intellectual and athletic performance. Energy Drinks and Sports Performance, Cardiovascular Risk, and Genetic Associations; Future Prospects Energydrinks have increasingly become a source of caffeine overdoses, according to a comprehensive study published in Pediatrics. Too much of these stimulants and chemicals can cause dependence, dehydration, insomnia, heart palpitations and/or an increased heart rate in both children and adults. But in children, these symptoms are often even Whyenergy drinks are harmful for heart health. "Of all the beverages that are potentially detrimental to heart health, energy drinks are at the top of the list," says Best, "and this is because Evenif you do not have a heart condition, high amounts of caffeine can strain your cardiac system. When you’re drinking an energy drink, watch out for warning signs of a potential heart issue Theymostly have a bad effect on your heart, but they can also have a negative effect on your behavior. Although they are unhealthy, energy drinks can be consumed irregularly and in small doses Heartpalpitations. Insomnia. Dehydration. Restlessness. Caffeine withdrawal is associated with headache, marked fatigue, anxiety, tremors and irritability. Energy drinks also contain other substances touted to Energydrinks can temporarily raise your blood pressure and heart rate. This can be particularly dangerous for people with underlying heart conditions. Even in JLnU9.