Diet's impact on alertness

I'm back! Today morning I've seen in one of the add-on edition pages of 'The Hindu' newspaper an article by Yandamoori Verenernath (is he the same guy famous for his masterpiece telugu novels???). He has unfurled some basic facts about the diet one takes and its impact on ones alertness at study. I liked the way it's written, because it gave substantial evidence to drive the point that's being stated. And the article certainly would appear to be a useful for a guy like me who never till now used to properly understand why he can't conquer sleep when it comes to studying, even after great amount of self meditation to concentrate on work/study. The notable points that I wish to share with all the fellow souls who happen to detest their ownselves on the same grounds are...
(1)refrain from eating sugar(sweet) items before/during study or work.
(2)Take as much water while at study/work as you can

The reason behing (2) is that water keeps one fresh. I've tested the same today and I am convinced. The small gulps of water I took at intervals of time boosted my freshness at least by a noticeable amount, promise!

Explanation for (1) needs some background. Sugars and milk contain very simple carbohydrates that are easily broken into amino acids releasing energy into blood instantly. Whilst food items like nuts, grains etc. contain complex carbohydrates, breaking whom into amino acids and realeasing energy is not instantaneous and would be a gradual process inside the stomach. When you eat sugars/milk etc. they are instantly broken down and a gush of energy is released into the blood cells. And once the food is exhausted there is a shortage in supply of energy to cells compared to the previous levels. These fluctuations in the energy flow into the blood and brain cells results in a dormancy state and we tend to get sleep. So its advisable to have more of nuts, grains and other complex carbohydrates that continue to provide energy in a gradual and all through out the day uniformly. And make it a point not to have sugars/milk before and during study/work.

There was another convincing reason given to a related but different issue - why after a heavy meal do I get sleep. The reason is that, heavy the meal more is the oxygen required to digest it. This oxygen requirement is partly fulfilled by taking it from brain. This leads to a sedative state called SLEEP.
The author reiterated a proven fact to distribute the required 2500 calories of energy from food intakes in the ratio 40:25:10:25 amongst b'fast, lunch, snacks and dinner respectively.

So my mantra from now on is going to be
'Eat b'fast like a King and lunch like a pauper'. Post dinner if I need to work then that would be a pauper meal or else it can be the normal dose.
With these facts known, I hope I'd be able to add more determinism into the quality of hours that I'm spending at work.

Thanks Yandamoori, for all your advice!!!