Here's the uncomfortable truth about the Supplement Facts panel: everything on it can be technically legal and still leave you with a completely wrong idea of what you're buying.
Unlike drugs, supplements aren't approved before they hit the shelf. The FDA steps in after the fact, and mostly for safety — not for whether the marketing math adds up.1 That leaves plenty of room for tricks that are perfectly compliant and deeply misleading. These are the six we run into most often.
1. The proprietary blend
The classic. Instead of listing each ingredient with its dose, the label groups them into a named blend — “Power Matrix, 2,400mg” — and only discloses the total. The law requires ingredients inside a blend to be listed in descending order by weight, and that's it.2
Which means a 2,400mg blend can be 2,300mg of the cheap first ingredient and a sprinkle of everything else. You have no way to know. In our experience, when a brand hides doses, it's rarely because the doses are impressive.
2. “Herb equivalent” dosing
“Panax ginseng 8,000mg” sounds enormous — until you notice the fine print: from 40:1 extract. The capsule contains 200mg of extract; the 8,000mg refers to the raw plant it was made from. Concentration ratios are useful chemistry, but printing the pre-extraction weight as the headline number is a marketing decision, not a scientific one.
3. Unstandardized extracts
Two bottles both say “Tongkat ali extract 300mg.” One is standardized to a measured percentage of eurycomanone — the compound the human studies were actually run on. The other is just… ground root, containing anywhere from a little of it to none at all. Without standardization, an herbal ingredient's dose is close to meaningless. If the label doesn't name the active compound and its percentage, assume the cheapest interpretation.
4. Fairy dusting
The reverse of the proprietary blend: the label proudly lists a famous, well-studied ingredient — at a dose far below anything ever studied. 50mg of ashwagandha (trials use 240–600mg), 10mg of citrulline, 1mg of ginkgo. The ingredient is there so it can be on the front of the box. It's decoration.
5. “Clinically proven ingredient” ≠ clinically dosed product
A brand can truthfully say an ingredient “has been shown in clinical studies to…” while its own product contains half — or a tenth — of the dose those studies used. The claim attaches to the ingredient, not the bottle. Always compare the label dose to the study dose; the gap is where most products quietly fail.
6. Serving-size arithmetic
“Only $29.99!” — for a bottle that lasts 15 days at the full serving of 6 capsules. Per-month and per-effective-dose, the “cheap” option is often the most expensive on the shelf. Do the math on cost per day at the studied dose, not cost per bottle.
The 30-second label check
- Every ingredient has an exact dose printed — no blends
- Herbal extracts are standardized to a named active compound
- Doses match the published studies (search the ingredient + “clinical trial dose”)
- The headline numbers aren't “equivalents”
- Cost per day at full serving, not per bottle
It takes half a minute and filters out most of the aisle. We used exactly this checklist — plus an independent lab — in our recent test of 5 best-selling testosterone boosters, and the results speak for themselves.
2 sources
- FDA. Dietary Supplements — regulatory framework overview (DSHEA, 1994).
- 21 CFR 101.36 — Nutrition labeling of dietary supplements (proprietary blend disclosure requirements).