L-Arginine
An amino acid the body converts into nitric oxide, the signalling molecule involved in relaxing blood vessel walls and supporting circulation.
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Ingredient hub
The Memodyne Ingredient Hub
An entry point to all six ingredient pages, grouped by pathway so you can see how the formula is structured rather than just what is in it.
How the Memodyne Formula Is Grouped
Six ingredients across three pathways. Reading them grouped this way makes the design visible, and makes clear where the evidence is stronger and where it is thinner.
Four ingredients, one circulation pathway
L-arginine, L-arginine AKG, L-citrulline HCL and L-citrulline malate. All four relate to nitric oxide production and therefore to blood vessel dilation.
Using four sources for one mechanism is deliberate. Oral arginine is substantially broken down in the gut and liver before reaching circulation; citrulline bypasses that and converts to arginine in the kidneys. The AKG and malate partners are both Krebs cycle intermediates, connecting this pathway to cellular energy.
One ingredient for cellular energy
Niacin (vitamin B3), the precursor for NAD+. This is the best-evidenced ingredient in the formula, with a formally recognised role in normal energy-yielding metabolism.
One ingredient for antioxidant support
Beta-alanine, the rate-limiting building block for carnosine. Well studied, though predominantly in exercise contexts rather than cognitive ones — its page is candid about that.
Memodyne does not disclose per-ingredient amounts
All six ingredients are named, which is more than many products in this category offer. What is not published is how much of each one a capsule contains.
That matters, because an ingredient's effect depends on its amount, and without figures nothing here can be compared to the doses used in published research. No milligram figures appear anywhere on this website — inventing them would be worse than leaving them out. If you see a page quoting precise amounts for this product, that information is not coming from the manufacturer.
Six pages
Every Memodyne Ingredient Page
What each one is, its general function, the research context and why it is included.
L-Arginine AKG 2:1 Extract
Arginine paired with alpha-ketoglutarate, a compound from the cellular energy cycle, included to support absorption and extend the effect.
Read moreL-Citrulline HCL
An amino acid the kidneys convert into arginine, which in practice raises arginine levels more reliably than taking arginine itself.
Read moreL-Citrulline Malate
Citrulline combined with malate, an intermediate in the Krebs cycle, linking the circulation pathway to cellular energy production.
Read moreNiacin (Vitamin B3)
An essential vitamin and the precursor for NAD+, the coenzyme central to how cells convert food into usable energy.
Read moreBeta-Alanine
An amino acid the body combines with histidine to form carnosine, a compound studied for its buffering and antioxidant roles.
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Research
Reading the Memodyne Research Honestly
The independent references below cover the three pathways. They concern the individual ingredients rather than the finished product, and much of the amino acid literature was conducted in exercise contexts rather than cognitive ones.
Returns
The Memodyne 60-Day Money-Back Guarantee
Memodyne is backed by a 60-day money-back guarantee running from the date of purchase. The brand states that after at least 30 days of use, if you are not completely satisfied, you contact customer support before the 60-day window closes to discuss your options.
Day 0
Purchase date. Note it down — the window runs from here, not from delivery.
Day 30
The brand's suggested trial period. Circulation support is framed as gradual.
Day 60
Guarantee closes. Contact support before this date, not after.
Two practical points. The window starts at purchase rather than delivery, so shipping time comes out of your 60 days. And the six-bottle package holds 180 days of product, so the guarantee closes with four bottles still unopened — set a reminder for around day 50.
Full refund terms are set by the seller. Read the official policy at checkout before ordering.
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Start Your Memodyne Daily Routine
One capsule each morning with a full glass of water, taken alongside the balanced nutrition, hydration and regular activity that support circulation far more than any capsule does on its own. Six named ingredients, no artificial stimulants, and a 60-day money-back guarantee on every order.
From $49 per bottle · Non-stimulant · Free US shipping on 3 and 6 bottles · 5 bonus guides included
