What Is a Proprietary Blend? Why We Avoid It.
By Ayush Goyal, Co-founder, EX1
A proprietary blend lists the total weight of several ingredients but hides each individual dose. Here is why that is the labelling pattern to avoid.
A proprietary blend is a labelling pattern where a supplement lists a group of ingredients together, with a single total milligram weight for the whole group, but does not declare how much of each ingredient is actually in the bottle. The law permits it. The scientific literature cannot use it. Recognising it is one of the most useful skills for reading a supplement label.
What a proprietary blend hides
A proprietary blend declares only the combined weight of several ingredients, hiding the individual doses. A label reading “Energy Matrix: 700 mg” could be 695 mg of a low-cost filler and 1 mg each of five marketing-friendly extracts, and the label gives you no way to tell. US FDA labelling rules permit this when only the total is shown.
US FDA labelling rules allow the practice as long as the total weight is disclosed, without requiring per-ingredient transparency. So a “matrix” can look substantial at 700 mg and still under-dose every active that matters. EX1 lists each ingredient by its own amount, more than label rules require, so every dose stays visible rather than hidden inside a combined total.
Why the opacity costs you
Clinical trials measure specific doses of specific compounds: 600 mg of withanolide-standardised ashwagandha, 5 g of creatine monohydrate. When a blend states only a combined weight, you cannot verify any single ingredient sits in the studied range. In a category where a clinical dose and an ineffective, token one can differ many times over, that gap is the whole risk.
Transparent labelling is a different choice. Every active ingredient gets its own line and its own milligram declaration, with the percentage of the daily value where one exists. Naming each active at a stated dose mirrors how trials report their formulations, and it lets a buyer compare two products on identical terms. It costs more, since the brand cannot hide low-cost filler behind a blend total, and it commits the formulation to the dose on the label, every batch.
How to spot a proprietary blend on a label: look for any group of ingredients listed together with a single total weight (often marketed as a “matrix”, “complex”, “system”, or “formula”) without per-ingredient milligrams shown next to each name. If the total is stated but the individual doses are not, you cannot evaluate the product against the clinical literature.
The EX1 take
EX1 will not use proprietary blends on any product, ever. Every active ingredient on every label has its own milligram declaration and percentage of RDA where one is established. Per-batch testing verifies the printed dose matches the bottle contents. Whether you're reading Multivitamin Men, Calcium + D3 + K2, or Lean Metabolism, the per-serving declaration shows every active by name and dose. The bottle matches the laboratory description.
Related reading: How to read an ashwagandha label.