Two words on a panel remove every individual amount from view, lawfully and in plain sight. Here is exactly what the rule permits, the fair argument for using it, and the arithmetic that decides whether a particular blend is worth your money.
The phrase is a legal permission, not a flourish
"Proprietary blend" is not marketing language that happens to sound technical. It is a specific allowance in federal labelling rules, and a brand that prints it is exercising a right rather than describing a recipe.
The allowance sits at 21 CFR 101.36(c). It exists because Congress, in the Dietary Supplement Health and Education Act of 1994, had to reconcile two things people wanted at once: full disclosure for buyers, and some protection for a formulator's work.
What the rule requires, and what it lets go
Required
The blend must be named. Every dietary ingredient in it must be listed. That list must run in descending order of predominance by weight. And the blend's total weight must be declared.
Not required
The amount of any individual ingredient. That is the whole of it — one omission, and it happens to be the only number a buyer is trying to find.
How to spot one in three seconds
Look for indentation. A blend is set as a heading with an amount, and its components sit indented underneath with no amounts of their own.
The names vary — "Focus Matrix", "Proprietary Complex", "Cognitive Blend". The structure does not: one figure at the right, several names beneath it, no second column.
The case for blends, made properly
The argument
A formulation is real work. Someone chose the ratios, tested them, and paid a contract manufacturer to make them reproducible. Publishing the exact split hands that work to any competitor with a purchase order.
Where it genuinely holds
It holds best for complicated botanical formulas with a dozen components, where the ratios are the intellectual property and there is no patent to protect them. Trade secrecy is the only shelter available, and a full panel dissolves it.
That is a serious argument and it deserves to be stated at full strength before it is answered.
Why it fails the buyer anyway
Descending order is a very weak constraint
Knowing that ingredient one outweighs ingredient two tells you almost nothing. In a 500 mg blend of six ingredients, the first could be 495 mg or it could be 90 mg, and both satisfy the rule identically.
The total is a ceiling, not a distribution
The one thing a blend total does establish is an upper bound: no ingredient in a 300 mg blend can exceed 300 mg. That is genuinely useful, and it is the basis of the check below.
Two formulas that print the same label
| Ingredient | Formula A | Formula B | Printed on both panels |
|---|---|---|---|
| First listed | 300 mg | 120 mg | listed first |
| Second | 100 mg | 110 mg | listed second |
| Third | 50 mg | 100 mg | listed third |
| Fourth | 30 mg | 90 mg | listed fourth |
| Fifth | 15 mg | 50 mg | listed fifth |
| Sixth | 5 mg | 30 mg | listed sixth |
| Blend total | 500 mg | 500 mg | 500 mg |
Both columns are lawful. Both print the same panel. A shopper comparing the two has no way to tell them apart, and neither does a reviewer.
The check that actually works
Take the blend total. Take the first-listed ingredient — the heaviest one. Compare that total against the range research has used for that ingredient, in a population resembling the buyer.
Worked example
Research on alpha-GPC in healthy adults has run at roughly 250–630 mg a day: a 2024 trial in Nutrients at 315 mg using a Stroop task, a 2018 dose-comparison at 250 and 500 mg, and a 2023 trial in cyclists at 300 mg.
So a blend totalling 200 mg cannot contain 250 mg of anything. If alpha-GPC is listed first among five ingredients in that blend, its amount is under 200 mg and probably well under. The conclusion is arithmetic, not suspicion.
The number that does not belong in this check
Higher alpha-GPC figures circulate in marketing — trials at 800 and 1,200 mg a day. Those were run in people with diagnosed cognitive impairment: a different population, different baselines, different endpoints. Quoting them at a healthy adult borrows authority from research that was not about them. The range and its populations are set out in how much alpha-GPC the research actually used.
What the check cannot conclude
A blend total comfortably above the research range proves nothing at all. It is consistent with a generous amount and equally consistent with a trace, padded out by five cheaper ingredients. The check is one-directional: it can rule a product out, never in.
What a trade secret actually protects
The formula-protection argument assumes a competitor cannot find out. In practice a contract analytical lab can quantify most actives in a capsule from a retail sample, and the manufacturers who make these products largely make each other's.
So the secrecy holds against shoppers and journalists more reliably than against competitors — which is the wrong way round if protection is the stated purpose.
Where the argument survives, and where it does not
| Situation | Does the protection argument hold? |
|---|---|
| Twelve botanicals in an unusual ratio, no patent | Reasonably — the ratio is the work |
| A blend built around one well-known active | Weakly — the ratio is not the innovation |
| Three or four ingredients, all commodity | No — there is nothing to protect |
| A blend where the first-listed ingredient is also the most expensive | No — the incentive runs the other way |
What a formula can do instead
Print every amount and compete on something a competitor cannot copy from a panel: sourcing, the specification behind each ingredient, testing, and the willingness to show the paperwork.
None of that is heroic. It is simply a different bet — that the buyers worth having are the ones who read the back of the pack.
Three questions worth emailing
What is the amount of each ingredient in the blend, in milligrams per serving?
If that is confidential, what is the amount of the first-listed ingredient alone?
Can you send the certificate of analysis for the lot number on this pack?
A brand that answers the first question has effectively abandoned the blend and could print it. One that answers the second has given up the only number that mattered. One that answers neither has told you something too.
Standing in the shop
Three steps, and none of them require a phone.
- Find the blend total and treat it as the ceiling for every ingredient inside.
- Read the first name in the list. That is the heaviest component, and nothing else.
- If the total is below the range research has used for that first ingredient, the pack has answered you.
The rest of the panel reads the same way it always does. That sequence is in how to read a Supplement Facts panel in about sixty seconds.
One place the same logic applies twice
Mushroom ingredients can be pooled inside a blend and vague on their own account, since "polysaccharides" is a broader category than the compound most people are looking for. Both problems are read off the same parenthetical, and that is covered in the one number to look for on a mushroom supplement.
Our own position
There is no blend line on Weal Focus: five ingredients, five amounts, each with its form printed beside it. That is a choice about disclosure rather than a claim about dose, and it can be verified in the same ten seconds as anyone else's panel.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Sources for every figure, with the population studied in each, are on our citations page.