Why Proprietary Blends Hide the Dose

Pick up almost any supplement in the cognitive, energy or sports nutrition categories and you'll find a proprietary blend. The practice is so widespread that most buyers assume it's simply how labels are written. It isn't — it's a choice, and it has consequences.

What a proprietary blend actually is

Regulations require supplement labels to disclose ingredients and amounts. A proprietary blend is a permitted exception: several ingredients can be grouped under one name with a single combined weight, listed in descending order by amount, without individual quantities.

So a label reads "Advanced Focus Complex — 900 mg" followed by eight ingredient names. Eight names, one number, no way to distribute that number among them.

The arithmetic problem

Consider that 900 mg blend with eight ingredients. The only thing you know for certain is that the first-listed ingredient is present in the largest amount. It could be 850 mg, leaving 50 mg to split among seven others — roughly seven milligrams each.

If one of those seven is an ingredient with published research at 300 mg, you're getting about two percent of the researched amount. And the label is entirely accurate. The ingredient is present. It's just present in a quantity with no plausible relationship to any study.

The industry name for this is fairy dusting, and proprietary blends are what make it invisible.

What the practice prevents you from doing

Four things, all of them reasonable.

Comparing to research. You cannot check whether a dose matches published trials if you don't know the dose.

Comparing products. Two competing blends at 900 mg each might have wildly different compositions. Price comparison becomes meaningless.

Checking interactions. If you take a blood thinner and a blend contains ginkgo, you and your doctor need to know how much. "Some amount within 900 mg" is not an answer either of you can work with.

Identifying a reaction. If you develop a side effect, you can't tell which ingredient or what amount caused it, which makes the information useless for future decisions.

The defence, and why it's weak

Manufacturers argue that blends protect formulation secrets from competitors. It's the only argument offered and it doesn't survive much scrutiny.

Any competitor serious about copying a formula can send it to an analytical laboratory. Reverse-engineering a supplement is neither difficult nor expensive relative to the cost of launching a product. The people meaningfully prevented from knowing what's in the bottle are the people who bought it.

There's also a simple observation: many of the best-regarded products in the category disclose everything and continue to compete successfully. If full disclosure were commercially fatal, they wouldn't exist.

What full disclosure looks like

A fully disclosed label lists each active ingredient on its own line with its own amount. No grouping, no combined weights, no blend names. You can read it, look up each ingredient, compare each amount to the literature, and hand the whole thing to a pharmacist.

That's not a premium feature. It's the default a buyer should expect, and treating it as remarkable is a sign of how normalised the alternative has become.

The grey areas

Two cases deserve fairness. Flavour systems and natural colour blends in powders are genuinely proprietary and don't affect efficacy — nobody needs the exact ratio of natural flavours. And some products disclose most actives individually while grouping a few minor ingredients, which is a reasonable middle ground.

The problem case is specific: the active ingredients you're buying the product for are inside the blend. That's when disclosure matters and its absence should cost the product your business.

What to do at the shelf

Turn the bottle over. If the ingredients you care about are grouped inside a blend, put it back and find a competitor that discloses. In most categories one exists, often at a similar price.

This is the rare consumer decision where the right move is simple and the information is free. It just requires reading the back of the bottle instead of the front.