Making it for somebody else
Updated
On this page5
Private label is manufacturing under another brand's name, and in supplements it is a substantial industry in its own right.
What you are selling
Capacity, a qualified formula, and increasingly the compliance file. A gym, clinic or coach wanting their own protein or greens product does not want to build a 21 CFR 111 quality system.
Which means the thing of value is frequently the specifications, the qualified suppliers and the testing history rather than the blending itself.
Why supplements suit it
Minimum viable runs are small, shelf life is long enough to make a modest run practical, and there is a large population of gyms, clinics, coaches and practitioners who want a branded product.
It also uses formulas you have already qualified, which is where the economics work: the per-formula costs are paid.
Who carries the obligation
Settle it in writing. Whose name appears as manufacturer, packer or distributor. Who registers. Who holds specifications and batch records. Who does identity and finished-product testing. Who keeps reserve samples. Who responds if there is a complaint.
And crucially: what happens if they make a claim you would not make. Their marketing on your manufacturing is a real risk in a category where a disease claim turns the product into an unapproved drug.
Put a claims clause in the contract and mean it.
The dependency risk
Private label revenue concentrates. One client can become a large share of output and can leave, bring it in house, or close.
Treat it as a supplement to your own brand rather than a foundation. The margin is lower, the customer is not yours, and the relationship is theirs to end.