Two words sit on a huge number of supplement labels and quietly do a lot of work: “proprietary blend.” Here’s what they actually signal — and what to look for instead.
They sound reassuring. Proprietary implies something carefully developed and worth protecting. Blend implies a considered combination. Together they suggest a formula so well-crafted its exact make-up needs guarding from competitors.
What a proprietary blend actually means, in regulatory terms, is narrower: the manufacturer isn’t required to disclose how the blend breaks down ingredient by ingredient — only the total weight of the blend as a whole. Ten things can be listed under one blend, and the split between them stays hidden. You have no way of knowing what dominates it and what’s barely there. That’s the point.
How the regulation works — and where it stops
In the United States, dietary supplements fall under the Dietary Supplement Health and Education Act of 1994, which requires manufacturers to list all ingredients but does not require them to break down the individual components grouped inside a proprietary blend. The total blend weight is stated. The internal split is not.
The protection had a legitimate origin: a brand that spent years developing a genuinely novel formula had a fair reason to shield its exact ratios from being copied overnight. In practice, though, the mechanism has largely been used for something less noble — obscuring which ingredients are actually carrying the formula and which are just along for the label.
Ingredient lists must run in descending order by weight, and that order still applies inside a blend. But without the breakdown, there’s no way to tell whether the headline ingredient makes up the bulk of the blend or just enough to sit first on the list. A proprietary blend isn’t proof that a formula is hollow. It’s the removal of your ability to check.
The “pixie dusting” problem
There’s an industry term for including an ingredient at a token amount — too little to do anything — purely so it can appear on the label: pixie dusting.
It exists because labels are marketing. A list naming ashwagandha, lion’s mane, rhodiola, L-theanine, phosphatidylserine and eight other recognisable actives communicates sophistication. A shopper scanning it sees ingredients they recognise from their own reading and feels confident. Whether several of those are present in any meaningful amount is invisible once they’re tucked inside a blend.
This isn’t fringe. It’s common enough that the serious third-party testing bodies — NSF International, Informed Sport, USP — build label-accuracy verification into their certifications. A product behind a proprietary blend can’t meaningfully carry that kind of verification for the blended part, because there’s nothing specific to verify against.
What transparent labelling actually looks like
The opposite of a proprietary blend isn’t a longer list — it’s a clearer one. Two things separate a transparent label from an opaque one.
First, named, standardised forms. There’s a real difference between a label that says “ashwagandha” and one that says KSM-66® Ashwagandha; between “magnesium” and Magnesium Bisglycinate Chelate (Albion®). The trademarked, standardised form tells you the grade and consistency of what you’re getting, not a generic mystery version chosen on price. A proprietary blend can hide whether you’re getting the premium form or the cheapest one that shares the name.
Second, independent verification. A label is a claim; third-party testing is the check on that claim — confirming the contents match the label and screening for heavy metals, contaminants and banned substances. The proprietary-blend dodge and meaningful third-party testing are structurally at odds: you can’t verify a formula that’s been deliberately obscured.
Why this matters for night recovery specifically
The night-recovery category is especially exposed to this, because it leans on a handful of high-value, research-backed actives — ashwagandha, magnesium glycinate, L-theanine, glycine — that are expensive in their premium standardised forms and easy to pixie dust while still looking impressive on a label. Two sleep products can have near-identical-looking ingredient lists and be completely different formulas underneath.
Moongreens takes the opposite approach to a blend. The actives are named openly by their standardised clinical forms — KSM-66® Ashwagandha, Magnesium Bisglycinate Chelate (Albion®), L-Theanine, L-Glycine, 5-HTP from Griffonia Seed, with a greens and gut layer in ProbioSEB® CSC-3, BioPerine® and Fibruline® — rather than buried inside an undisclosed blend, and the product is third-party tested. That’s a deliberate choice, and the reasoning cuts the other way too: if a brand won’t tell you which form of an ingredient it’s using, the most likely reason is that the honest answer wouldn’t help its case.
Reading the label differently
The practical takeaway is a simple reframe. “Proprietary blend” is a flag to slow down, not a mark of sophistication — it means the brand is either protecting something genuinely novel (possible, increasingly rare) or keeping the breakdown out of view. Without independent verification, you can’t tell which.
Named, standardised forms you can recognise — KSM-66®, Albion®, BioPerine® — combined with third-party testing is the combination that signals a brand has made claims it’s willing to have checked. Everything else is trust, and in this industry, trust without verification is a thin foundation for a purchase.
Try it for a full sleep cycle
Thirty nights isn’t long enough to judge a recovery formula — the adaptogens take six to eight weeks to reach full effect. So Moongreens comes with a 90-night guarantee: enough time to feel the difference in how you wake up, not just how you fall asleep. If it isn’t doing its job, you haven’t lost anything. Made in the USA.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.