Blog

The Memodyne reading room: five articles, one question each

Five articles about this category rather than about one product: how long a capsule like this takes, what the citrulline trials measured, why a label can carry names without amounts, what happens when a bottle and a sales page disagree, and what the published evidence supports for memory.

Every article is cited to its PubMed record and every amount is the amount a trial used.

The index

Five articles

How Long Does Memodyne Take To Work?

By the Memodyne Team · September 2026 · Reviewed by Dr. Collin Liu, MD

Four to eight weeks is what the distributor reports. Here is what the trials behind the ingredients measured, and when.

Read the article

Citrulline And The Brain: What The Trials Measured

By the Memodyne Team · September 2026

The best-evidenced name on this bottle was studied for blood vessels. What that does and does not tell you about memory.

Read the article

A Supplement Label With No Numbers On It

By the Memodyne Team · September 2026

Why the artwork carries six names and no amounts, what the printed panel is for, and how to read a label that will not tell you.

Read the article

When A Bottle And A Sales Page Disagree

By the Memodyne Team · September 2026

Calcium on the artwork, beta-alanine on the seller's page. Which source wins, and why it is worth knowing about.

Read the article

What Actually Helps Memory In The Published Evidence

By the Memodyne Team · September 2026

Hearing, blood pressure, exercise and sleep, with the trial numbers attached. None of the four is sold on this website.

Read the article

Longer reading

Where to go next

The buyer's checklist

Twelve questions to ask of anything on this shelf, then the same twelve applied to the product this desk sells.

Read the checklist

The evidence guide

What the published record supports for cognition, the six ingredient families, and where the nitric-oxide group sits.

Read the guide

The reading room

Everything on this site that is about the category rather than about one bottle, in one place.

Open the reading room

About this review

How the articles in this reading room are sourced

Livingston G, Huntley J, Liu KY, Costafreda SG, Selbæk G, Alladi S, et al. Dementia prevention, intervention, and care: 2024 report of the Lancet standing Commission. Lancet. 2024;404(10452):572-628. PMID 39096926. https://pubmed.ncbi.nlm.nih.gov/39096926/
Lin FR, Pike JR, Albert MS, Arnold M, Burgard S, Chisolm T, et al. Hearing intervention versus health education control to reduce cognitive decline in older adults with hearing loss in the USA (ACHIEVE): a multicentre, randomised controlled trial. Lancet. 2023;402(10404):786-797. PMID 37478886. https://pubmed.ncbi.nlm.nih.gov/37478886/
Reboussin DM, Gaussoin SA, Pajewski NM, Jaeger BC, Sachs B, Rapp SR, et al. Long-term effect of intensive vs standard blood pressure control on mild cognitive impairment and probable dementia in SPRINT. Neurology. 2025;104(3):e213334. PMID 39819096. https://pubmed.ncbi.nlm.nih.gov/39819096/
Schwedhelm E, Maas R, Freese R, Jung D, Lukacs Z, Jambrecina A, Spickler W, Schulze F, Böger RH. Pharmacokinetic and pharmacodynamic properties of oral L-citrulline and L-arginine: impact on nitric oxide metabolism. Br J Clin Pharmacol. 2008;65(1):51-9. PMID 17662090. https://pubmed.ncbi.nlm.nih.gov/17662090/
Nogimura D, Nagaoka K, Ogino K, Ogino N, Moriyasu K, Morita M. Vascular effects of l-citrulline supplementation in healthy adults are largely influenced by the prehypertensive range of blood pressure: a double-blind, randomized, placebo-controlled, parallel-group study. Nutr Res. 2026;150:157-173. PMID 42142423. https://pubmed.ncbi.nlm.nih.gov/42142423/
Minto C, Vecchio MG, Lamprecht M, Gregori D. Definition of a tolerable upper intake level of niacin: a systematic review and meta-analysis of the dose-dependent effects of nicotinamide and nicotinic acid supplementation. Nutr Rev. 2017;75(6):471-490. PMID 28541582. https://pubmed.ncbi.nlm.nih.gov/28541582/
Rabec M, Bourgeais A, Gautier J, Corvaisier M, Brière O, Annweiler C. Association between calcium supplement use and cognitive impairment in ageing women: a longitudinal analysis. Australas J Ageing. 2026;45(2):e70186. PMID 42159347. https://pubmed.ncbi.nlm.nih.gov/42159347/
Ambrosio G, Wirth D, Joseph JF, Mazzarino M, de la Torre X, Botrè F, Parr MK. How reliable is dietary supplement labelling? Experiences from the analysis of ecdysterone supplements. J Pharm Biomed Anal. 2020;177:112877. PMID 31568967. https://pubmed.ncbi.nlm.nih.gov/31568967/

Written and reviewed by the Memodyne Team at Maemodyne

This desk works from two documents and always says which one it is using. The first is the carton: the ingredient names, the capsule count, the three band words and the directions line are transcribed from it and quoted rather than paraphrased. The second is the seller’s published page, which supplies the pack prices, the bonus bundle and the refund window, each printed with the day it was read. Nothing else counts as a source here. Where the two disagree, as they do about the sixth ingredient, both readings are shown and the carton is followed. Since the supplied artwork has no Supplement Facts panel, the milligram column on this website belongs to the published trials rather than to the product: the amount a study gave, the people it enrolled and the thing it measured. Every reference was retrieved from the NCBI summary service while these pages were being built, then screened for retraction twice, at paper level and at author level. Find an error and it is fixed in public, with the review date moved to prove it: [email protected]. Every page, every journal post, the bottle facts and the ingredients go through review by Dr. Collin Liu, MD before they ship. Last reviewed September 2026 by Dr. Collin Liu, MD.