Diet is a touchy subject with more than a few people. They feel self conscious
 about what they eat, they do not have the will power to change what they eat, 
or maybe even do not want to change what they eat. Fortunately, long periods of
 time at a computer are not exceedingly taxing, and do not require a large diet
 overhaul.

	The normal diet of a gamer can most likely stay the same, presuming you
 are in good health and bring in the nutrients needed for the chemical synthesis
 process which creates energy.  “The effects of energy-restricted diets 
containing increased protein on weight loss, resting energy expenditure, and the
 thermic effect of feeding in type 2 diabetes” (Diabetes care  (Diabetes care)  
ISSN 0149-5992   CODEN DICAD2) states that a low-fat diet with an increased 
protein-to-carbohydrate ratio does not significantly blunt the fall in REE 
(resting energy expenditure). I personally do not agree with this. My diet is 
high in carbohydrates, and high in protein. 

Since I do not have the needed training to give such medical information, I will
 leave your large diet changes to you and your physician.

	Water. It’s my secret weapon. I can go on average, awake and alert, 15 
to 20% longer in a controlled ergonomic workstation, while drinking water, not 
soda, or other high caffeine diuretics. Water improves your energy, increases 
your mental, and physical performance, cleans and detoxifies your body, and 
reduces headaches and dizziness. Think about it, your blood is 83% water, and 
your muscles and brain are 75% water. You cannot function at your highest 
capacity while dehydrated. Energy drinks, and diuretic sodas’ can give you a 
quick burst in energy, but rob you of water. Compensate by drinking 1 to 2 cups
 of water for each drink like this. I personally will use 2-4 energy drinks (Red
 Bull FTW) in a 10 to 12 hour grinding session.

The use of water cannot be stressed enough.