Guides: how to read a memory supplement before you buy one

Two long guides and five articles, written by this desk for readers deciding between products rather than reading about one. They cover what a supplement label has to tell you, what it is allowed to leave out, which claims are permitted, and what the published record says actually moves cognition.

Nothing in this section sells anything. It is the reading this desk would want before spending money in this category.

Long reads

The two long guides

Both written from the published record rather than from a product.

Choosing a memory supplement

What to look for on a panel, what a proprietary blend is allowed to withhold, how to compare an ingredient against the amount its research used, and the six questions worth asking before any purchase in this category. Read the guide.

The memory supplement guide

A longer piece on the category itself: what is on the shelf, what the published evidence supports, which claims are permitted and which are not, and what the randomised trials of non-supplement interventions found. Read the guide.

Shorter reads

Articles from this desk

Five pieces, each answering one question this desk is asked repeatedly.

Reading the Memodyne Supplement Facts panel

The seven rows on the panel, where the sales page names fewer, and how far each amount sits from the research. Read it.

Citrulline and arginine: what the trials used

The pharmacokinetics, the blood-pressure results and the amounts, set out for a reader deciding whether a capsule can plausibly carry them. Read it.

Niacin, calcium and the two numbers you can check

The only two ingredients on this label with public reference values, and what those values are for. Read it.

How long a memory supplement takes to do anything

Time courses for the mechanisms involved, and why a month is the honest minimum for judging one. Read it.

What actually moves memory in the published record

The randomised trials of exercise, lifestyle programmes and vascular risk, and where a capsule sits beside them. Read it.

The whole index

Every article in one list, with its date and its length. Open the index.

The method

How this desk writes about supplements

Five rules, applied to the guides as much as to the product pages.

A label claim is quoted, never paraphrased into something stronger.
A product's amounts come off its panel, and any other amount is labelled with the trial that used it.
Every citation is fetched from the source in the session it is written, and checked for a retraction notice before it is used.
A product's weaknesses go in a named section rather than being spread across every paragraph or left out altogether.
Where the strongest evidence points at something this desk does not sell, the page says so.

The full method, including what this desk refuses to do, is on the about page. Corrections are welcome at [email protected] and are made on the page rather than quietly.

Elsewhere on this desk

Three more Memodyne pages worth opening

Choosing a memory supplementSix questions to ask before buying anything in this category. The memory supplement guideThe category, the claims and the evidence, at length. All articlesFive pieces from this desk, with dates and lengths.

About this desk

Sources used across these guides

The records the guides and articles are built from.

Hersant H, He S, Maliha P, Grossberg G. Over the Counter Supplements for Memory: A Review of Available Evidence. CNS Drugs. 2023;37(9):797-817. PMID 37603263. https://pubmed.ncbi.nlm.nih.gov/37603263/
Baker LD, Espeland MA, Whitmer RA, et al. Structured vs Self-Guided Multidomain Lifestyle Interventions for Global Cognitive Function: The US POINTER Randomized Clinical Trial. JAMA. 2025;334(8):681-691. PMID 40720610. https://pubmed.ncbi.nlm.nih.gov/40720610/
Ngandu T, Lehtisalo J, Solomon A, et al. A 2 year multidomain intervention of diet, exercise, cognitive training, and vascular risk monitoring versus control to prevent cognitive decline in at-risk elderly people (FINGER): a randomised controlled trial. Lancet. 2015;385(9984):2255-63. PMID 25771249. https://pubmed.ncbi.nlm.nih.gov/25771249/
Quan J, Zhu L, Chen Z, Chen Z, Li B, Yu S. Optimal type and dose of exercise for improving executive functions in older adults: a systematic review and Bayesian model-based network meta-analysis of RCTs. BMC Geriatr. 2026;26(1). PMID 42260365. https://pubmed.ncbi.nlm.nih.gov/42260365/
Memory, Forgetfulness, and Aging: What's Normal and What's Not? National Institute on Aging, National Institutes of Health. https://www.nia.nih.gov/health/memory-loss-and-forgetfulness/memory-forgetfulness-and-aging-whats-normal-and-whats-not
Alternative Treatments. Alzheimer's Association. https://www.alz.org/alzheimers-dementia/treatments/alternative-treatments
Health Products Compliance Guidance. U.S. Federal Trade Commission, December 2022. https://www.ftc.gov/business-guidance/resources/health-products-compliance-guidance

Written and reviewed by the Memodyne Team at Memoadyne

Every page, every journal post, the bottle facts and the ingredients go through review by Dr. Gianna Link, MD, PhD before they ship. Every page here starts at the bottle. The Supplement Facts panel, the three words on the teal band and the directions line are read off the label as the seller publishes it and quoted as printed; the guarantee and the contact routes are read off the supplier’s own paperwork. Each amount on the panel is set beside the amount its published trials actually used, with the population and the outcome attached. Every PubMed record cited was pulled from the NCBI service and the citation written from the fields it returned, so any reader can check one in about twenty seconds. Spot something wrong and it is corrected on the page and the review date moves: [email protected]. Last reviewed September 2026 by Dr. Gianna Link, MD, PhD.