The Proprietary Blend Problem On Supplement Labels
A proprietary blend is a legal way to list what is in a product without telling you how much. It is not fraud, it is not rare, and it is the single biggest obstacle between a buyer and an informed decision. Here is how to handle one.
What a proprietary blend actually is
US supplement labelling rules require manufacturers to list ingredients, but allow them to group ingredients into a named blend and give a single combined weight rather than a figure for each component. So a label may say "Cognitive Support Blend, 550mg" followed by ten ingredient names in descending order of quantity, and that is the whole disclosure. You know the order. You do not know whether the first ingredient is 500mg of the 550 or 60mg of it.
Manufacturers give two reasons. The first is protecting a formula from copying, which is largely unpersuasive because competitors can pay a lab to analyse a bottle. The second is unstated and more honest: disclosure would show that the headline ingredient is present at a fraction of its research dose, which is very often the case.
The three-minute arithmetic that exposes it
You do not need a laboratory. You need the blend total and a search engine.
- Write down the blend's total milligrams.It is on the label, next to the blend name.
- Look up the studied human dose of the first three ingredients.Not the marketing dose — the dose used in published human trials. Fifteen minutes of searching gets you there for most ingredients.
- Add those three together and compare.If the sum exceeds the blend total, at least one ingredient is underdosed, and you now know the formula cannot deliver what its research implies.
Run this on Memo Volt and it fails immediately. Saffron Extract was studied at 28–30mg. Morosil was studied at exactly 400mg. Berberine HCl was studied at 900–1,500mg. Those three alone are over 1,300mg before you reach the other seven ingredients, and Ceylon Cinnamon Bark's own research is measured in grams. Something is far below its studied amount, and the label is designed so that you cannot tell which. That is the argument laid out in full on our evidence page.
What a disclosed label looks like
| Label style | What you can verify | What to conclude |
|---|---|---|
| Full per-ingredient disclosure | Every dose against every study | Trustworthy format Judge it on the numbers. |
| Disclosed actives, blended excipients | The ingredients that matter | Acceptable Common and reasonable. |
| One blend, ten names | Order only | Unverifiable Assume underdosing unless proven otherwise. |
| Blend plus "clinically studied" claim | Nothing | Red flag The claim refers to ingredients, not to the product. |
What to do about it
Three options, all defensible. Buy the blend anyway and treat the refund window as your protection, which is the pragmatic route and the one most people take. Buy a single-ingredient product with a disclosed dose instead, which for a saffron-led formula is usually cheaper and always verifiable. Or skip both and spend the money on the interventions with real evidence, which cost nothing and outperform every supplement ever tested for cognition.
What is not defensible is buying a proprietary blend while believing you have bought the doses from the studies. That belief is what the format is designed to produce.
Sources
- NCCIH — using dietary supplements wisely
- NIH Office of Dietary Supplements — ingredient fact sheets
- MedlinePlus — herb and supplement monographs