Label guide
How to read a proprietary blend
A proprietary blend lets a manufacturer group several ingredients under one name and publish one combined weight instead of separate amounts. It is legal. The only quantitative information that survives is the ordering rule: ingredients inside the blend must be listed in descending order of weight. From a blend line you can learn the total and the order. You cannot learn any individual amount, and neither can anyone else.
What a blend line is
On a Supplement Facts panel, most ingredients get their own row with their own amount. A proprietary blend gets one row with one amount, and then the ingredient names appear underneath it, indented, with nothing beside them.
That indentation is the whole device. Visually it looks like a list of contents. Functionally it is a curtain: the names are on this side of it and every number is on the other.
It is not a loophole
Proprietary blends are explicitly permitted under US labelling rules, and they were permitted for a defensible reason: a formula is a piece of commercial know-how, and publishing exact ratios hands it to competitors. Whether that protection should outweigh a buyer's ability to evaluate what they are swallowing is a real argument with two sides. What is not arguable is what the device costs you, which is everything quantitative.
What the descending-order rule tells you
One rule survives the curtain: the ingredients inside a blend must be listed in descending order of predominance by weight. This is more useful than it first appears, and much less useful than people hope.
What you can conclude
- The first ingredient is the largest single component of the blend.
- The last is the smallest.
- The total weight of everything combined, which is printed on the blend row.
- That the first ingredient is at least the total divided by the number of ingredients — because if it were less, something else would have to be more.
- That the last ingredient is at most that same average figure.
What you cannot conclude
- Any actual amount for any ingredient.
- Whether the split is even or wildly lopsided. A nine-ingredient 1000 mg blend could be 920 mg of the first and ten of each of the rest.
- Whether any ingredient reaches a studied dose.
- Whether the amounts have changed between production runs.
- Whether the listed order reflects a formulation decision or a cost decision.
That fourth bullet on the left is the most useful piece of arithmetic in this guide, so here it is again in plain numbers: in a 1000 mg blend with nine ingredients, the first ingredient is at least 111 mg. That is the only lower bound the label gives you about anything.
The blend arithmetic
Three sums, none of them harder than division, that will tell you more about a blend than the front of the bottle ever will.
| Sum | How | Why it matters |
|---|---|---|
| The average share | Blend total ÷ number of ingredients | 1000 ÷ 9 = 111 mg. Compare that against the studied dose for each ingredient. If most are studied in grams, the formula cannot be delivering them |
| The first-ingredient floor | Same figure | The first-listed ingredient is at least the average. That is your only guaranteed minimum for anything |
| The last-ingredient ceiling | Same figure again | The last-listed ingredient is at most the average, and quite possibly a tiny fraction of it |
| The credibility check | Count how many ingredients are studied above the average share | If the answer is most of them, the label is selling names rather than doses |
Run the last row on almost any nine-ingredient metabolic blend and you get the same answer. That is not a conspiracy; it is the arithmetic of putting nine things in a gram.
Why manufacturers use them
To protect a formula
The stated reason, and a legitimate one. A published ratio can be copied by anyone with a contract manufacturer and a week.
To allow a long ingredient list
Nine names on a front label reads as better value than two. A blend makes nine names affordable, because none of them has to be present in a meaningful quantity.
To avoid publishing small amounts
If cinnamon is present at 40 mg against a studied dose of grams, a blend line is the difference between an impressive label and an embarrassing one.
To keep costs flexible
Ingredient prices move. A blend total can stay the same while the mix inside it changes, and no label needs reprinting.
Only the first of those four is a reason that benefits you. The honest reading is that a blend is sometimes protection and often concealment, and from the outside the two look identical.
The five questions
What is the blend total, and how many ingredients share it?
Divide. That average is the number every other judgement rests on.
Which ingredients are studied above that average?
Look each one up. Any studied in grams, in a blend of under two grams, is not present at a studied dose.
Are extract ratios published?
A 10:1 extract at 100 mg is equivalent to a gram of raw material. Without the ratio, an "extract" is just a word.
Does the first ingredient make sense for the product's purpose?
It is the biggest part of what you are buying. If it has no obvious connection to the reason the product is sold, ask why it is there.
Does the blend's name match the product's purpose?
This sounds trivial and is not. A blend named for one use case inside a product sold for another means the formula and the marketing were written by different people, or the formula was reused.
Five questions, two minutes, and no expertise required. They work on any blend on any shelf.
Reading a real one
The product this site sells is a fair test case, so here are the five questions run on it in public.
- Total and count: 1000 mg, nine ingredients. Average share 111 mg.
- Studied above that average: cinnamon (grams), bitter melon (grams), garcinia (grams), apple cider vinegar (a liquid format entirely), tongkat ali (200-400 mg), epimedium (100-900 mg). Six of nine are studied above the average share.
- Extract ratios: not published for any of the seven botanical ingredients.
- First ingredient: L-Lysine HCL, an essential amino acid with no published connection to glucose metabolism. It is the largest part of the blend and the label offers no reason for it.
- Blend name versus product purpose: the blend is called Test Boost Proprietary Blend. The product is sold as Blood Health Support Capsules.
Why this is on a site that sells the product
Because you would have worked it out eventually, and a reader who works it out afterwards has been sold something. Our own verdict on this product is 2.2 out of 5, and the label transparency row scores 1.
What to do when the answers are not published
- Ask the seller. Directly, by phone. What they can and cannot answer is information in itself. For this product the number is +1 (302) 200-3480.
- Weight the ingredients you know are cheap. Rice powder, amino acids and fruit powders cost far less than standardised extracts. A blend led by a cheap ingredient is telling you where the money went.
- Compare against a single-ingredient bottle. Cinnamon and bitter melon are both sold alone, with published amounts, usually for less than a blend. Run the cost-per-day sum on both.
- Read the return terms before paying. If you cannot evaluate the product from the label, the refund window is the only protection you have.
- Buy the smallest pack first. Always, for anything you cannot evaluate in advance.
And the general principle: a blend is not proof of a bad product. It is proof that you cannot tell. Those are different findings and it is worth keeping them apart.
- U.S. Food and Drug Administration (2026). Questions and Answers on Dietary Supplements.
- U.S. Food and Drug Administration (2026). Dietary Supplement Labeling Guide.
Read the label first, then decide
Sixty capsules a bottle, one 1000 mg blend, nine ingredients and no per-ingredient amounts. The live price and the return terms are both on the seller’s checkout screen.
Listing return terms · Questions first? Call +1 (302) 200-3480