Key takeaways
- A proprietary blend lists a total weight for several ingredients but not each one's amount.
- Without individual doses you cannot compare with research or with other products.
- Ingredients are listed in descending order by weight, which gives only a rough clue.
- Fully disclosed labels are easier to trust and to compare.
Flip over almost any supplement and you may see a line such as 'Performance Matrix 3,000 mg' followed by a list of ingredients. That is a proprietary blend, and it matters more than it looks.
What it actually means
In the United States, a supplement facts panel may list a blend's total weight and then its ingredients in descending order of weight, without giving the amount of each ingredient. Companies say this protects formulas. The effect is that you cannot tell how much of each ingredient you are really getting.
Why that is a problem
- You cannot compare with research. Studies use specific doses. If a blend does not state yours, there is no way to know whether it is a meaningful amount.
- Cheap ingredients can dominate. A blend can be mostly an inexpensive ingredient with tiny amounts of the expensive, well-known one.
- You cannot price-check. Without doses, cost per useful serving is a guess.
What to prefer
Look for labels that state the amount of every active ingredient per serving. In Canada, products licensed by Health Canada carry a Natural Product Number (NPN), and the Licensed Natural Health Products Database lists approved ingredients and doses. In the U.S., look for a clear Supplement Facts panel and, ideally, third-party testing.
A quick comparison
| Fully disclosed label | Proprietary blend |
|---|---|
| Each active ingredient and its dose | One total weight for the whole group |
| Easy to compare with research | Impossible to compare |
| Easy to check value per serving | Value is a guess |
Rule of thumb
If a brand will not tell you how much of an ingredient is in each serving, treat the product with caution, and do not assume that a long ingredient list means a stronger product.
Sources and further reading
- U.S. Food and Drug Administration: Dietary Supplements
- Health Canada
- NIH Office of Dietary Supplements
General reference sources, linked for further reading. Always check current guidance for your country and situation.
Reviewed and updated October 17, 2026. This article is for general information and is not medical advice. See our medical disclaimer.
