The logic behind the "clarity" claim, laid out honestly with its caveats.
Memo Vance Pro is marketed for mental clarity and focus. Its rationale runs through circulation, not directly through memory.
L-Arginine and L-Citrulline are precursors your body uses to make nitric oxide, which helps blood vessels relax and supports healthy blood flow. The marketing links better circulation to brain support.
Even where circulation improves, the connection to "mental clarity" is indirect and modestly evidenced. It is not the same as a direct, proven effect on memory or focus.
Most circulation research uses multi-gram doses of these amino acids. Memo Vance Pro's totals — about 400mg arginine and 200mg citrulline — are far lower, so any effect is likely to be subtle.
Niacin (7.5mg NE) and calcium (18mg) are small nutritional amounts; Beta Alanine (40mg) is best known in sports nutrition. None is a proven memory ingredient at these doses.