Label literacy

How to Read a Proprietary Blend on a Supplement Label

Reviewed by Dr. Brian Christine, MD

“Proprietary blend, 82 mg” is legal, common and almost entirely uninformative. Here is what that line does and does not tell you, plus the three checks that turn it into something you can judge — run, at the end, on this product.

What a proprietary blend actually is

A proprietary blend is a group of ingredients declared together under one name and one total weight. United States labeling rules permit it: the manufacturer must name what is in the blend and give the combined weight, but it does not have to publish how much of each.

That is not a loophole anyone is sneaking through. It is the rule as written, and the large majority of supplements in this category use it.

What it is not

It is not evidence of anything hidden or dangerous, and it is not by itself the mark of a bad product. It is simply a label you cannot verify from the outside — which matters, because verifying is exactly what a careful buyer is trying to do.

The one piece of real information

Ingredients inside a blend are listed in descending order by weight. That single rule is the only quantitative information a blend gives you, and it is worth using.

If a botanical you care about is listed last out of nine, it is the smallest share of the total. On an 82 mg blend, the ninth ingredient could be a fraction of a milligram. Read the order, not just the names.

Three checks that make it judgeable

1. Find the total. One number, usually in milligrams, at the end of the blend line. This is your denominator for everything else.
2. Look up one trial dose. Pick the headline ingredient and find what the human studies actually used. If the whole blend weighs less than one ingredient's studied dose, no ingredient in it can be at that dose.
3. Read the order. Anything below the midpoint of a long list is a minor share by definition.

A worked example: this product

We will run the three checks on JellyFil rather than on a competitor, because a label-literacy article that only audits other people's products is not worth much.

• The total: 82 mg across nine botanicals, plus 5 mg of caffeine declared separately.
• A trial dose: the ashwagandha meta-analysis pooled trials using roughly 300–600 mg a day of a single extract, and the maca trial used grams. Either figure exceeds this entire blend.
• The order: muira puama leads the list; horny goat weed sits last of the nine.

The conclusion, stated plainly: no botanical in this blend is present at the dose its research used, and the ones near the end of the list are present in very small amounts. That is what an 82 mg blend means. It is why the ingredients page prints each trial dose alongside each name instead of leaving you to look it up, and why the honest summary of this product on the reviews page is “mild, if anything” rather than a promise.

Four other things a label can do legally

The blend is the best-known device, but it is not the only one worth recognising. None of these is illegal and none of them means a product is bad — they simply make a panel look stronger than it is, and they are easy to spot once named.

Fairy dusting

Including a fashionable ingredient in an amount too small to do anything, purely so the name can appear on the front of the bottle. The blend total is what exposes it: if twelve ingredients share 50 mg, most of them are decoration.

Borrowed evidence

Citing a trial that used 500 mg of an extract on a product that contains a fraction of that. The study is real, the ingredient is real, and the connection is not. This is the most common misuse of a genuine citation in the category, and it is why every entry on our ingredients page prints the trial dose next to the name.

Counting the serving, not the capsule

“Serving size: 3 capsules” at the top of a panel changes every number below it. A formula that looks three times stronger than a rival may simply be asking you to take three times as much. Always check the serving size before comparing two labels.

Proprietary names for ordinary ingredients

A trademarked blend name is a brand, not a specification. Some trademarked extracts genuinely are standardised and studied, which is useful; many are ordinary material with a name attached. The test is the same as always — is there a standardisation figure, and is there a dose?

A checklist you can use in a shop

Thirty seconds with a bottle in your hand, in order:

1. Serving size first. Everything else is meaningless without it.
2. Find the blend line and its total. That number is the ceiling.
3. Count the names inside it. Total divided by names is the generous average.
4. Read the order. The last two or three are trace amounts.
5. Look for “standardised to”. Its presence is a good sign; its absence is not damning.
6. Check what is outside the blend. Anything declared on its own line has a real, checkable amount — that is the part of the label you can trust most.
7. Then read the front of the bottle, and notice how much of it the panel actually supports.

The FDA's questions and answers on dietary supplements is worth ten minutes if you buy supplements regularly; it explains what the category is obliged to do and what it is not. Our own seven-check version, written for this category specifically, is on the choosing a men’s supplement page.

Why manufacturers use them

• To protect a formula. The stated reason, and a real one — exact ratios are the work.
• To allow supply flexibility. Ratios can shift between batches without a label change.
• To list impressively. Nine names read better than three, and a blend lets a manufacturer include a name without committing to an amount. This is the reason worth being skeptical about.

The FDA's questions and answers on dietary supplements sets out how the category is regulated, and NCCIH's guidance is the best neutral primer on reading botanical labels generally. If you want to check the specific bottle you were sent, the batch verification page explains what a certificate of analysis can and cannot confirm.

What a genuinely good label looks like

It is easier to criticise a panel than to describe a better one, so here is the standard we think is fair — knowing that this product does not meet all of it, which is the point of printing it.

Three yes, two no, one qualified. We would rather publish that table than a page explaining why the blend is actually a strength. If full per-ingredient disclosure is your bar — and it is a reasonable bar — then almost nothing in this category clears it, including this product, and a single-ingredient capsule at a studied dose is the better buy.

The one thing a blend can never tell you

Whether the amount you are taking is the amount that was studied. Everything else on a label can be worked around with arithmetic and a little scepticism; that cannot. Knowing it is the difference between buying with open eyes and buying on a number you could not verify.

References