Pitcher,
This was asked of me recently by a client. I was not too familiar as I personally do not consume energy drinks so I did some research.
I will try anything 'nutritional' once as long as it is legal and I can read the label first. This stuff is thick, non - carbonated, and very sweet tasting. I am highly sensitve to anything that has high concentrations of caffeine and this had my heart racing after about 10 minutes and 6 - 8 ozs.
A brief breakdown of some of the ingredients:
Evodiamine
+Raises body temperature
+Inhibits the growth and metastases of certain
cancer cells in vitro
+Influences the metabolism of certain drugs
+Influences the secretion of catecholamines from the adrenal glands
It, from all the information, does not seem to be a safe product, and no human trials have been conducted on it. The concentration needed to produce those effects is much higher than that found in most 'energy' drinks.
Synephrine
+Supposed weight-loss supplement. Effectiveness doubted by the medical community.
Needs high concentration to be effective in rats. (Lab trials)
Vinpocetine -
http://www.pdrhealth.com/drug_info/nmdrugprofiles/nutsupdrugs/vin_0259.shtml Click the link to learn more about that one.
The other 2 are "poser" chemicals.
It WILL give an energy buzz but a full bottle could flush out an undiagnosed heart issue. There is also a recommendation on the label that you eat prior to drinking to help with absorption. This in and of itself is scary to me.
My recommendation to kids - Eat as properly as you can, REST, practice, train smartly and enjoy the high of playing the game. If you rest, which is something most 13 - 18 year olds do not do very well, then the regeneration needed to participate should be more than adequate.