Memopezil ingredients: the full label, dose by dose

Most ingredient pages for a supplement are a list of names with a compliment attached to each one. This is not that. Below is every entry on the Memopezil Supplement Facts panel, the amount declared for it, and the amount the published human trials actually used — because a milligram figure only means something next to the dose it is being compared with. Where the label amount falls short of the studied one, we say so. Where an ingredient has no relevant human evidence at all, we say that too.

The Memopezil Supplement Facts panel, in full

A two-capsule daily serving supplies the following. One 60-capsule bottle is therefore a 30-day supply.

The single most useful thing about that panel is what is missing from it: a proprietary blend. Every amount is individually declared, which means every amount can be checked against the literature. That is the minimum condition for the rest of this page to be possible at all, and a surprising number of nootropic labels fail it — the mechanics of how are set out in proprietary blends versus named doses on a supplement label.

How each Memopezil dose compares with the dose used in trials

This is the comparison that decides whether an ingredient list means anything. Each row pairs the declared amount with a specific published human trial and its dose.

Read the verdict column and the honest summary of this formula writes itself: the label is transparent, and the amounts are conservative. Three of the five entries sit below the doses that generated the research they borrow credibility from. That does not make them inert — dose-response for these botanicals is not a cliff edge — but it does mean nobody should expect a trial-sized effect from a below-trial dose.

Bacopa monnieri 200 mg: the strongest evidence, at a reduced dose

Bacopa monnieri is the reason this formula exists and the only entry with a repeatedly replicated memory finding behind it. In the trial by Stough and colleagues in Psychopharmacology, healthy adults took 300 mg a day of a standardised extract and were tested at baseline, 5 weeks and 12 weeks; the effect appeared at week 5 and was larger at week 12. Two further 12-week trials, Calabrese 2008 in adults aged 65 and over and Morgan and Stevens 2010 in older Australians, used the same 300 mg daily dose and reported improved delayed word recall.

The 2014 meta-analysis pooling those and other randomised trials is more restrained than the marketing built on it. Its most consistent pooled effects were on speed of attention — Trail Making Test B and choice reaction time — rather than on memory across the board. “Bacopa improves speed of attention over about twelve weeks” is a defensible sentence; “bacopa is a memory booster” is not.

Memopezil declares 200 mg. That is a genuine, checkable amount and it is a third less than the trial dose. The practical consequence is about patience rather than futility: if 300 mg needed 8 to 12 weeks to show up on a test battery, 200 mg is not going to do better on a shorter clock. The full timeline, week by week, is in how long bacopa monnieri takes to work.

What the label does not tell you about the bacopa

The panel prints a milligram amount but not a bacoside percentage. Bacosides are the compounds the trial extracts were standardised against, and without that figure two 200 mg entries from two different manufacturers are not directly comparable. This is not a Memopezil-specific failing — most labels in the category omit it — but it is a real limit on how precisely the dose above can be matched to the research.

Rhodiola rosea 100 mg: the right ingredient, a different extract

Rhodiola is included for the flat, foggy tiredness that arrives under pressure, and that is exactly what its trials measured. Darbinyan and colleagues dosed 170 mg a day of the SHR-5 extract for two weeks in physicians working night duty and recorded improvement on a composite of mental performance. Olsson, von Schéele and Panossian randomised 60 adults with stress-related fatigue to 576 mg a day of the same extract for 28 days and reported lower fatigue and better attention. Ishaque and colleagues reviewed the field in 2012 and found the trials too methodologically limited for a firm verdict, which is the honest ceiling.

Two things follow for the label. First, 100 mg is below both studied regimens. Second, and more importantly, those trials used SHR-5 — a specific characterised root extract — and matching a milligram figure with different material does not reproduce a trial. The Memopezil entry names a salidroside percentage but not a rosavin percentage, and rosavins are the marker that distinguishes genuine Rhodiola rosea from cheaper species in the same genus. Why that particular number carries so much weight is the subject of the rosavins versus salidroside label check.

L-theanine 100 mg: the only entry you may notice the same day

L-theanine is the fastest-acting ingredient on the panel and the one most likely to be responsible for any same-day sensation from the capsule. It is absorbed quickly, and Nobre and colleagues recorded increased alpha-band activity from 45 minutes after a dose. The best-replicated behavioural finding, though, is a combination result: Kelly and colleagues, in the Journal of Nutrition in 2008 tested 100 mg of L-theanine with and without 50 mg of caffeine and found that L-theanine alone produced no measurable change on the attention task, while the pair improved hit rate and target discriminability.

That matters here because Memopezil is caffeine-free by design. The counterweight is a 2026 meta-analysis in Molecular Psychiatry, which pooled 31 randomised trials and found that a single 200 mg dose taken 30 to 60 minutes before testing improved choice reaction time on its own — a solo finding, at twice the amount on this label. So 100 mg is a real, published dose with EEG data behind it, sitting at the lower and less replicated end of the behavioural evidence. We walk through the whole dose-response ladder in L-theanine without caffeine.

Panax ginseng 90 mg: the smallest dose on the panel

Panax ginseng is the entry with the widest gap between reputation and measured effect. The cognition literature runs almost entirely on G115, a standardised extract normalised to roughly 4% ginsenosides, at doses commonly between 200 and 400 mg a day. Reay, Kennedy and Scholey gave single 200 mg and 400 mg doses and reported reduced blood glucose and improved performance during sustained mental activity; a later trial in healthy young adults reported modest working-memory gains and higher subjective calmness. Against that, the Cochrane review of ginseng for cognition concluded there was no convincing evidence of benefit in healthy participants.

At 90 mg, Memopezil supplies well under half the low end of that studied range, and the label does not declare a ginsenoside percentage. The fair description is a supporting ingredient rather than an active one, and it carries a genuine caution that has nothing to do with dose: ginseng can affect blood glucose and has been reported to interact with anticoagulants such as warfarin. The wider evidence picture is in Panax ginseng for mental fatigue.

The 540 mg BCAA blend: honestly, a nutrient base

Branched-chain amino acids are the entry we would remove if the decision were ours, and we would rather say so than dress it up. The mechanism is genuinely real: leucine, isoleucine and valine cross into the brain on the LAT1 transporter, and Fernstrom’s 2005 review in the Journal of Nutrition showed that raising plasma BCAAs lowers brain uptake of tryptophan and tyrosine, because they compete for the same carrier. That is a documented, measurable effect.

It is also not obviously a good thing, and it has never been shown to improve cognition in a healthy adult. The human cognitive trials on BCAAs were run in patients recovering from severe traumatic brain injury, using intravenous infusion of about 19.6 grams a day — roughly thirty-six times the amount in this capsule, by a completely different route, in a completely different population. Add the arithmetic that an ordinary mixed diet already supplies something like 12 to 13 grams of BCAAs a day, and 540 mg becomes a rounding error against dietary background. Our full read is in why BCAAs are in a brain supplement.

What is not in Memopezil

Absences are as informative as inclusions, and three are worth naming because people search for them specifically.

• No caffeine or other stimulant. Nothing on the panel produces a coffee-style lift. If you want an acute jolt, this is the wrong category of product — the reasoning is in why coffee stopped working.
• No lion’s mane, ginkgo, citicoline or phosphatidylserine. These turn up in competing formulas and several of them have respectable evidence. They are simply not in this one, and any page implying otherwise is describing a different product.
• No gummy or liquid version. Memopezil is sold as a capsule. A gummy or drop marketed under the name is not the product this page describes.

What this ingredient list does not prove

Four limits, stated plainly, because a transparent label earns the right to be checked rather than a pass.

• No trial has tested this formula. Every study cited above tested a single ingredient at its own isolated dose. The five-ingredient capsule has never been through a trial of its own, and combining studied ingredients does not inherit their results.
• Three of five doses are below the studied amounts. Bacopa, rhodiola and ginseng all sit under the figures that generated their evidence. That is a reason for measured expectations, not a claim that they do nothing.
• Two standardisation figures are missing. No bacoside percentage for bacopa and no rosavin percentage for rhodiola means the match to trial material is partial.
• Nothing here treats a disease. These ingredients are studied for support in generally healthy adults. Genuine memory change is a medical matter, and it warrants a clinician rather than a capsule.

Related reading

• Bacopa and Rhodiola for Memory and Focus: What the Research Shows
• Nootropic Stack vs Single Ingredient: Which Wins?
• When to Take Bacopa, Rhodiola and L-Theanine

Frequently asked questions