Hello Friends this is informed to you that I am using red bull energy drink from the three months, as per my knowledge and experiences red bull one of the best energy drink as compare to another energy drink. Red Bull gives me extra energetic internal power. Few month ago I completely worn down due to overwork but now I am very happy only because of redbul energy drink, after drinking it I feels better and get extra energetic power. In a week I drink only two or three cans maximum, their is no side effect and no harmful for human body, you can use it any times according to your privilege.Best energy drink for human being. Try everyone. Thank you.