The Regulatory Gap
This is not a technical oversight or a resource limitation. It is how the system was designed. Understanding the regulatory framework that governs supplement health claims is the first step to understanding why independent verification matters.
The Law
In 1994, Congress passed the Dietary Supplement Health and Education Act (DSHEA), which fundamentally reshaped how supplements are regulated in the United States. The law was passed in response to intense lobbying by the supplement industry and reflects a deliberate policy choice to treat supplements more like food than like drugs.
Before DSHEA, the FDA had broader authority to regulate supplement claims. After it, manufacturers gained the right to market products with health claims without pre-market approval, without clinical trials, and without submitting evidence to any regulatory authority before putting their products on shelves.
DSHEA did not eliminate all regulation. Manufacturers are still prohibited from claiming their products diagnose, treat, cure, or prevent disease: those are drug claims. But they are permitted to make structure/function claims: statements about how a nutrient or ingredient affects the normal structure or function of the body.
Structure/Function Claims: What They Are
A structure/function claim describes the role an ingredient plays in maintaining normal body structure or function. Examples include:
These claims are legally permitted under DSHEA as long as they meet the required format. What is not required: that they be scientifically true.
The Process
When a manufacturer wants to put a structure/function claim on a supplement label, the legal requirement is straightforward: notify the FDA within 30 days of first marketing the product.
Not submit evidence. Not await approval. Not respond to feedback. Simply notify.
The FDA does not review the notification for scientific accuracy. It does not evaluate whether the claim is true. It does not issue approval or denial. The notification goes in, and the manufacturer continues marketing their product. The entire process takes 30 days and requires essentially no scientific documentation.
Manufacturers are required to have “substantiation (evidence that the claim is truthful and not misleading) on file. But this substantiation is not submitted to anyone. It sits internally. No external body reviews it. The FDA would only look at it in the event of an enforcement action, which, as we will discuss, almost never happens.
How a Supplement Claim Gets to Market
Manufacturer writes a claim
Internal team decides what health claim to put on the label. No external review at this stage.
Product goes to market
The product is sold to consumers before any regulatory review.
FDA notified (within 30 days)
Manufacturer sends a simple notification. FDA does not review or approve.
Enforcement action (rare)
Only if the FDA identifies a problem and chooses to act, which almost never happens.
The Reality
The FDA can take action against supplement manufacturers who make false or misleading claims, but the agency is chronically underfunded relative to the size of the industry it oversees. The supplement market includes tens of thousands of products. The FDA’s resources for supplement enforcement are minimal.
The practical result: enforcement actions are rare, slow, and typically reserved for egregious cases: products making drug claims, products with dangerous ingredients, or manufacturers with documented histories of violations. A supplement making a scientifically unsupported structure/function claim is, from an enforcement standpoint, almost entirely below the radar.
Warning letters (the FDA’s primary enforcement tool short of legal action) are issued in small numbers each year relative to the size of the market. Manufacturers who receive them typically have months or years to respond and correct the issue, during which the product continues to be sold.
$50B+
U.S. supplement market annually
50k+
Supplement products on the U.S. market
~0%
Pre-market scientific review by the FDA
The Core Problem
When the FDA does evaluate a supplement claim, it is looking at structure and language, not scientific validity. The agency asks: does this claim describe a structure or function of the body rather than claiming to diagnose, treat, cure, or prevent a disease? If the format is correct, the claim passes regulatory muster.
This distinction has profound consequences. It means that two claims with identical formatting (one backed by decades of strong science, one backed by nothing) are treated identically under the law.
The calcium-versus-fiber example illustrates this perfectly. Both claims are phrased correctly. Both would sail through the notification process. But the scientific evidence behind them is completely different.
Two Claims. One Legal Standard. Two Different Realities.
Ingredient
Calcium
FDA Status
Legally Compliant“Supports bowel regularity”
Scientific evidence:
RED — No evidenceNo credible research supports calcium as a driver of bowel regularity. The claim is legal. The science does not exist.
Ingredient
Dietary Fiber
FDA Status
Legally Compliant“Supports bowel regularity”
Scientific evidence:
GREEN — Strong evidenceExtensive, replicated evidence supports fiber’s role in digestive regularity. The claim is legal. The science backs it up.
The FDA cannot tell these apart. ClaimCheck can.
The Consequences
The practical consequence of this regulatory framework is that consumers are purchasing products based on claims that may have no scientific foundation,and they have almost no way to know.
The disclaimer on every supplement bottle (“This statement has not been evaluated by the FDA”) is required because the law acknowledges that the claim has not been independently verified. Decades of familiarity have made this disclaimer nearly invisible. Most consumers either do not notice it or have learned to ignore it.
The result is a market where scientifically robust products compete on equal footing with products making scientifically empty claims. Consumers cannot easily distinguish between them. The label is not a reliable guide. The price is not a reliable guide. Brand familiarity is not a reliable guide.
You cannot trust the label alone. A health claim on a supplement is a marketing statement, not a scientific certification. It tells you what the manufacturer wants you to believe, not what the evidence supports.
Higher price does not mean better evidence. Premium pricing reflects branding and marketing, not scientific rigor. An expensive supplement with a scientifically empty claim is still scientifically empty.
Third-party “quality” certifications are not the same as claim certification. USP, NSF, and similar certifiers verify that a product contains what the label says it contains. They do not evaluate whether the claim is scientifically valid.
What ClaimCheck Does
ClaimCheck exists because the regulatory system was not designed to tell consumers or manufacturers whether a supplement claim is actually true. We evaluate every claim on two axes,regulatory compliance and scientific validity,and publish every result in a free, public database.
We are not a government body. We are not affiliated with any manufacturer. We are an independent certification organization whose only incentive is accuracy.
For consumers
A free, searchable database that tells you what the evidence actually says about any supplement claim. No account required.
Learn more →For manufacturers
Independent certification that signals scientific credibility to consumers and provides documented due diligence for regulatory purposes.
Learn more →