Has Magnus Carlsen ever disclosed exactly what kind of orange drink he brings to all of his matches? 
I guess that it is mixed or diluted in water which explains why they are always in branded water bottles.
Doping in chess
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breyerian wrote:
jesterville wrote:
There are many drugs which -
- Keep you awake
- Increase your concentration span in the short term
- Increase strength and Indurance
- Make you feel alert and full of energy
Yet there is no drug that makes you play better chess. What good is increased attention span and energy if you don't have the theoretical fundation in place?
Assuming that two players are of equally high caliber, being able to stay focused better and longer can avoid hallucinations, mistakes, blunders or inaccuracies.
Lasker used this tactic to win the title from Steinitz.
Kasparov did the same to Karpov in their first world championship match in 1985.
Who needs drugs when you can camp in toilets and still win major matches. Ask Topalov. 
There are many drugs which -
- Keep you awake
- Increase your concentration span in the short term
- Increase strength and Indurance
- Make you feel alert and full of energy
All of these benefits will give a chess player an advantage OTB.
The only way to get respect for your sport is to try and keep it clean.
Yet there is no drug that makes you play better chess. What good is increased attention span and energy if you don't have the theoretical fundation in place? If there was a pill that gave you a grasp of the minority attack, pins, weak squares, or how to play closed positions there would be an argument. As of now, there is none.