[flowlikeh2o]

Its unlikely that depriving your brain of fuel is having a positive effect on concentration, but since eating carbs triggers insulin, which supresses the effects of adrenaline, you might just be experiencing the benefits of not saturating your diet with sugar.

[sasas]

The brain is not being deprived, rather it's deriving it's energy from a different source -

> the brain starts burning ketones in order to more directly use the energy from the fat stores that are being depended upon, and to reserve the glucose only for its absolute needs [1]

Additionally -

> Because the brain can only power 70% of its action on ketones, glucose will have to be used no matter what. However, because glucose can be derived from non-carbohydrate sources such as protein, a low carb or no carb diet does not starve the brain of its required energy. [2]

And your absolutely right in regards to experiencing the benefits of removing sugar from the diet.

[1] http://en.wikipedia.org/wiki/Ketosis

[2] http://www.nootropicmind.com/better-brain-fuel-source-carbs-...

[flowlikeh2o]

I meant to say it's primary fuel source. Will look into this more, but I would think avoiding suppression of epinephrine has to account for some of the effect of cutting to a no/low carb diet.

[sasas]

Good luck with your research! Peter Attia could be a good place to start -

http://eatingacademy.com/nutrition/ketosis-advantaged-or-mis...

[aboutus]

Try it. Switching your brain to keytones definitely has a zen-like effect.