A bottle of supplements typically costs a fraction of its retail price to manufacture. This guide answers the most common questions about where the rest of that money goes, synthesized from the reporting in The Hollow Aisle.
A modest share goes to the ingredient, capsule, and packaging — often produced by a contract manufacturer supplying dozens of competing brands from the same production lines. The rest funds marketing, distribution, retail margin, and increasingly, a subscription model built to convert a one-time sale into recurring revenue a customer has to actively cancel.
An affiliate marketer, including many health influencers, typically earns a commission of roughly 10 to 50 percent of a sale traced to their link — paid regardless of whether the product delivers any benefit to the buyer. That structural fact holds even when the person recommending the product genuinely believes in it; sincerity and financial interest aren't mutually exclusive.
A 2024 Federal Trade Commission staff report, reviewing public income disclosures from dozens of MLM companies, found that most participants earned $1,000 or less per year, and that in at least seventeen of the companies reviewed, most participants earned no money at all. A separate AARP survey found nearly half of MLM participants reported losing money once expenses were accounted for.
"The industry's dominant business models — subscription revenue, affiliate commissions, and multi-level recruiting — all generate income from a sale independent of whether the product benefits the buyer."The Hollow Aisle
Terms like "pharmaceutical grade," "clinically tested," and "third-party tested" borrow the credibility of real scientific and regulatory standards without being bound by any of their actual requirements. "Pharmaceutical grade," for instance, has no regulatory definition for a supplement at all — no federal agency certifies it. "Third-party tested" can mean a rigorous, named, independent certifier, or an unnamed internal lab with no public standard.
| The phrase | What it actually guarantees |
|---|---|
| "Pharmaceutical grade" | Nothing — no regulatory definition exists |
| "Clinically tested" / "research-backed" | Some study exists; size, rigor, and publication status undisclosed |
| "Third-party tested" | Varies from a named, rigorous certifier to an unnamed internal lab |
| "Detox" | A function the liver and kidneys already perform, unaided |
Platforms optimize for engagement, not accuracy — content stated with total confidence reliably outperforms hedged, careful content, because confidence holds attention better regardless of whether the claim is true. A creator builds a real relationship with an audience over months or years, and that trust gradually extends to health recommendations no formal credentialing process ever assigned them to make.
For some publishers, yes. A piece of confidently wrong health content that drives traffic and affiliate clicks is not a failure by the metric that actually gets tracked — it's a success. Ad revenue rewards engagement; affiliate commissions reward conversion. Neither revenue stream includes a mechanism that rewards accuracy or penalizes error.
Every figure on this page is drawn from the sourced reporting in The Hollow Aisle. See the book for full citations.