Energy drinks for chess tournament I am planning to participate in a tournament, and I was thinking about using energy drinks or caffeinated drinks to enhance my performance.

Is this a good idea? I normally don't take any energy drinks. Will it be counterproductive if I suddenly take up energy drinks, or is it better since I won't develop reliance on energy drinks?

If it is good, how much energy drinks should I take (in milligrams of caffeine), and when is the best time to do so?

Or does energy drink has no effect on chess performance whatsoever?

The only side effect I know about energy drinks is that it is diuretic, but it won't be much of a concern as the time control for the tournament is long.

Thanks.
From a guy that drinks for too many energy drinks.

Don't.

They give a rush for 40 minutes tops and then a crash.

Anxiety is also massively induced/increased.