"Supports joint health" is legal. "Cures arthritis" is not. The line between the two decides whether a supplement is regulated as food or should legally be regulated as a drug — and most consumers have no idea it exists.
The law that created this line
The Dietary Supplement Health and Education Act of 1994 (DSHEA) set up the modern framework for how supplements are regulated in the US. Under DSHEA, a supplement can legally carry a "structure/function claim" — a statement about how an ingredient affects the normal structure or function of the body — without needing FDA pre-approval, as long as certain conditions are met.
What makes a claim legal
A structure/function claim describes a role in maintaining normal, healthy function — think "supports bone density," "helps maintain healthy cholesterol levels already in the normal range," or "promotes relaxation." These claims don't require FDA approval before the product goes to market, but the manufacturer must have substantiation on file and must notify the FDA within 30 days of first marketing the claim. The label must also carry a specific disclaimer: that the statement hasn't been evaluated by the FDA and the product isn't intended to diagnose, treat, cure, or prevent any disease.
What crosses into illegal territory
A disease claim states or implies that a product will diagnose, cure, mitigate, treat, or prevent a specific disease — "cures arthritis," "treats depression," "reverses type 2 diabetes." Once a product makes this kind of claim, it's being marketed as an unapproved drug, not a dietary supplement, and falls outside what DSHEA permits for supplements sold without FDA drug approval. This applies regardless of whether the ingredient itself is safe — the issue is the claim, not necessarily the ingredient.
How to spot the line in practice
- Watch for verbs: "supports," "maintains," and "promotes" tend to signal structure/function claims; "cures," "treats," "prevents," and "reverses" tend to signal disease claims
- Watch for a named disease or condition attached to the claim — mentioning "arthritis," "diabetes," or "depression" by name alongside a promise of resolution is the clearest red flag
- Check for the required FDA disclaimer on the label — its absence alongside a strong health claim is itself worth noting
- Be skeptical of claims implying the product replaces a prescribed medication, even if it never uses the word "cure" directly
Why this distinction matters to you as a buyer
A supplement making an illegal disease claim hasn't gone through the safety and efficacy review that an actual approved drug for that condition would have. The claim itself is a signal that the marketing has outpaced what's actually been established about the product — not proof the ingredient is dangerous, but a sign the claim shouldn't be trusted as if it came from an approved medicine.
What this means practically
- A supplement can legally say it "supports" a body function without any disease being named or implied to be resolved.
- The moment a specific disease is named alongside a promise to cure, treat, or reverse it, the claim has left the space DSHEA allows for supplements.
- The required disclaimer statement is a useful, quick way to confirm a product is at least labeled as a supplement rather than an unapproved drug.
- This is a claims-language issue, separate from whether the underlying ingredient itself is safe or effective — always evaluate both.
Sources
- FDA — Dietary Supplement Health and Education Act of 1994 (DSHEA) overview: fda.gov
Related Kibbo Tools
- Supplement Claim & Marketing Red Flags Checklist — spot disease-treatment language and other claim red flags before buying.
- Supplement Label & Claims Verification Worksheet — verify a specific product's claims in detail, ingredient by ingredient.