The researchers noted that the drinks contain high levels of caffeine and warned that certain susceptible people risk dangerous, even life-threatening, effects on blood pressure, heart rate and brain function.
This is a quote from an article in the New York Times about energy drinks. Here's the full article and worth a read, espeically if you find yourself purchasing energy drinks often.
If you really need an energy boost, try Spark from Advocare:
Here's a neighbor of mine who recently tried Spark:
"As a mom and group fitness instructor, I need to have plenty of energy! I had tried many supplements and energy drinks, but I did not have consistent results with any of them. Some of them left me jittery and unable to sleep at night. Amy recommended I try the Advocare Spark product. I love it! It provides long-lasting energy without the jitters. Even on the days I do not drink Spark, I feel I do not need any coffee. I've also lost my craving for sweets. I would definitely recommend Advocare products."
Check it out and let me know if you have questions!