What does fairy dusting mean on a supplement label?
Fairy dusting means listing an ingredient on a supplement label at a dose too small to do anything, just large enough to print the name for marketing. It's legal because federal rules let a "proprietary blend" disclose the ingredients and their total weight but not how much of each one you're actually getting.
Here's the part that catches people off guard: nothing about it breaks the rules. The label isn't lying. It's just not required to tell you the one number that would let you judge it.
Why is that legal?
Under 21 CFR § 101.36, a supplement can list a group of ingredients under a name like "Energy Blend" or "Recovery Complex" and give you exactly two pieces of information about it: the combined weight of everything in the blend, and the names of the ingredients inside it, ranked from most to least by weight [1]. What the rule does not require is the amount of each individual ingredient [1]. The Council for Responsible Nutrition, the industry's own trade group, is straightforward about why the carve-out exists: it protects a company's exact recipe as a trade secret, the same way a food company doesn't have to publish its sauce ratio [4].
That's a real, legitimate reason for a company to want a blend. It's a much weaker reason for you to buy one blind. A recipe can be a secret and still be dosed well. The rule doesn't require that, either.
There's a plainer reason too. A milligram of an expensive, trending ingredient costs more than a milligram of a cheap one, and a blend that only discloses a total weight makes it easy to lean on the cheap side of that math while still printing the expensive name on the front.
How small is "too small"?
A 2019 analysis of the top 100 best-selling multi-ingredient pre-workout products on one large online retailer read what each product's label declared, ingredient by ingredient, and compared the labeled amounts against the dose research says is needed for an effect [2]. The authors are direct about what this data is and isn't: the figures come from supplement facts panels, and "may not reflect actual ingredient amounts" [2]. The averages below cover the products that printed a specific number for that ingredient on its own line, outside a blend, not what a lab found inside one, and not an average across the full hundred products:
- Creatine was listed at an average of 2.1 g on the products that declared it. The dose the research supports is at least 3 g a day [2].
- Beta-alanine was listed at an average of 2.0 g on the products that declared it. The dose associated with a performance effect is about 4 g a day [2].
- Caffeine was the one of the three that averaged above its threshold, at 254 mg against roughly 210 mg, which the authors describe as near the low end of an effective dose [2].
Two of those three land under the dose that does anything, on the labels that disclosed a number. Beta-alanine tops the category's prevalence list at 87% of the 100 products, ahead of caffeine at 86% and citrulline at 71%; creatine is only sixth, present in 49% of the sample [2]. Prevalence isn't the problem here, dosing is, and it gets worse further down a ten-item blend, on the ingredients sitting on the smaller share of an already-thin total weight. Almost half of all the ingredients across those hundred products, 44.3%, sat inside a blend where the individual amount was never disclosed at all [2]. You can't do this math yourself on a label that only gives you a total.
The NIH's Office of Dietary Supplements makes a related point from a different angle: because much of the research has tested single ingredients rather than combinations, "one...cannot know or predict the effects and safety of combinations in these multi-ingredient products unless clinical trials have investigated that particular combination" [5]. The same page notes that in some cases products contain proprietary blends listed in order by weight, with the amount of each ingredient left off the label [5]. The low doses are one problem. The bigger one is that unless a trial has tested that exact combination, its effects aren't established, and a blend that discloses only a total doesn't even tell you which combination you're taking.
What does a fairy-dusted label look like?
The tell is almost always the same shape: a blend name in bold, a single total weight next to it, and a list of ingredients underneath with no numbers attached. If you see "Proprietary Blend 500 mg" followed by six or eight ingredient names and nothing else, you're looking at a total, not a dose. The first ingredient on that list, by weight, might be doing real work. The last one is very likely along for the marketing.
A label that instead prints "creatine monohydrate 5 g" as its own line, with nothing hiding it inside a named blend, is telling you the actual number. Creatine monohydrate at 3 to 5 g a day is the dose the International Society of Sports Nutrition's position stand gives for maintaining muscle creatine stores once they are saturated; the same position stand calls creatine the most effective ergogenic supplement available to athletes for increasing high-intensity exercise capacity [3]. That's the difference fairy dusting exists to blur: not whether an ingredient is in the product, but whether you were told enough to know if it does anything.
Fairy dusting isn't the same as a fake label
It's worth keeping these two problems separate, because they call for different levels of concern. Fairy dusting is legal. A company chose a real ingredient, dosed it below the research level, and disclosed exactly as much as the rule requires. Nobody broke a law.
A mislabeled product is a different, worse problem: the label states an ingredient or amount that simply isn't in the bottle. A 2023 analysis of 57 sports supplements marketed around specific botanical ingredients found that 89% of labels didn't accurately declare what the product actually contained, and 40% of the products had no detectable amount of the botanical ingredient listed on the label [6]. That's not an underdose you could at least calculate from the label. That's a label that isn't telling the truth at all, and it's the kind of thing regulators and lawsuits exist for. Fairy dusting hides behind a rule. A fake label just ignores one.
How AUROM handles this
We don't use blends in anything we sell. AUROM's creatine is a single ingredient: micronized creatine monohydrate, 5 g per scoop, printed on its own line because there's nothing to combine it with. It's the same 5 g used in the research above, not a fraction of it rounded down to fit a cheaper recipe. A Certificate of Analysis is available per batch on request.
The whey protein isolate works the same way. Each flavor's ingredient list is three items: whey protein isolate, natural flavors, stevia extract. No blend name, and nothing indented under a heading with the amount left out. A transparency claim without a number on it is just a claim.
FAQ
Is fairy dusting illegal? No. It's a byproduct of a legal disclosure rule for proprietary blends, not a violation of it [1]. That's exactly why reading the label yourself matters: nothing is going to flag it for you.
Do all proprietary blends fairy dust their ingredients? Not necessarily. A blend can be dosed generously and still not disclose the split. But you have no way to tell a well-dosed blend from a thin one without the number, and the rule doesn't require the company to give it to you [1][4].
Is there a legal minimum amount an ingredient has to be present at? No. Section 101.36 sets no minimum for how small an ingredient's share of a blend can be: it governs how the panel is laid out, requiring the blend's total weight and the ingredient order, and says nothing about how little of any one ingredient has to be there [1].
How do I check a specific product? Look for ingredients listed with their own individual amount, outside of any blend name. If everything you care about is on its own line with a number next to it, there's nothing to fairy dust. If it's indented under a blend name with only a combined weight, you're being asked to trust the total, and there's no way to work backward to what any one ingredient actually contributes.
Does a bigger total blend weight mean a better dose? Not on its own. A 500 mg blend of two ingredients can be dosed better than a 1,000 mg blend of ten, because the ten-ingredient version has more names competing for the same total, and predominance order only tells you which ingredient has the most, not how much that actually is.
The short version
A supplement label doesn't have to lie to be useless. It just has to combine enough ingredients under one name that the number you'd actually need to judge it never has to appear. The fix isn't complicated: look for individual doses on individual lines, and treat a blend with only a total weight as an unknown, not a bonus.
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.
Sources
- 21 CFR § 101.36, Nutrition labeling of dietary supplements, Cornell Law School Legal Information Institute
- Common Ingredient Profiles of Multi-Ingredient Pre-Workout Supplements, Jagim, Harty & Camic, Nutrients, 2019
- International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine, Kreider et al., Journal of the International Society of Sports Nutrition, 2017
- Regulatory Responsibilities and Best Practices for Manufacturing and Marketing Dietary Supplements Containing Proprietary Blends, Council for Responsible Nutrition, 2022
- Dietary Supplements for Exercise and Athletic Performance (Health Professional Fact Sheet), NIH Office of Dietary Supplements
- Presence and Quantity of Botanical Ingredients With Purported Performance-Enhancing Properties in Sports Supplements, Cohen et al., JAMA Network Open, 2023