The brain is a small fraction of body weight but uses a disproportionate share of the body's oxygen and glucose supply. Every act of recall, concentration or decision-making depends on that supply arriving reliably.
This is why nitric-oxide amino acids like L-Arginine and L-Citrulline show up in cognitive formulas — they support the relaxation of blood vessels, widening the pathway oxygen and nutrients travel to reach brain tissue.
Niacin plays a complementary role, supporting the cerebral microcirculation that makes sure those nutrients actually reach the neurons that need them, not just the bloodstream in general.
None of this happens overnight. Circulatory support is a daily-habit story, not a same-day feeling — which is why consistency matters more than any single dose.
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