MemoHoney is built on the idea that a tired brain is often an under-supplied brain, so the formula targets circulation first and cellular energy second. The seller describes three mechanisms, and the evidence behind each one is different.
Arginine is the direct substrate your body uses to make nitric oxide, and citrulline converts to arginine in the kidneys — a more efficient route, since citrulline escapes much of the first-pass breakdown that removes a large share of an oral arginine dose. Nitric oxide relaxes the smooth muscle lining blood vessels, and wider vessels mean improved perfusion. That chain is real physiology. The leap from vessels in general to measurable memory improvement specifically is a hypothesis the research partially supports, not a settled finding.
Beta-alanine raises tissue carnosine, and carnosine acts as a buffer and antioxidant in laboratory work. This is the weakest of the three pillars: most beta-alanine research concerns high-intensity exercise performance rather than neuroprotection, and the doses used in that research are substantial.
Niacin is the least controversial pillar. Every tissue converts niacin into NAD, the coenzyme more than 400 enzymes depend on, including the ones that turn food into usable energy. Genuine niacin shortfall does cause cognitive symptoms, but outright deficiency is rare in countries with fortified flour — so for most people with an adequate diet, this ingredient is topping up something already full.