Private label supplements: white label vs private label vs custom, and what to check before you sign

Private label supplements are made by a contract manufacturer and sold under your brand. Suppliers split the idea three ways: white label (their stock formula, your label), private label in the narrow sense (a stock base adjusted or reserved for you) and custom formulation (built to your specification). Whichever you choose, your brand is on the label, and so is the legal responsibility.

What are private label supplements?

A private label supplement is a product made by a contract manufacturer and sold under a brand the manufacturer doesn't own: yours. The manufacturer sources the ingredients, makes and packages the product and tests it against a specification. You own the customer, the brand, the claims and the marketing, and you decide what ships under your name.

The model exists because a brand and a factory need different skills and different amounts of capital. A factory needs equipment, a quality unit and a steady stream of orders from many brands. A brand needs a customer, a message and the cash to buy traffic. Private label lets each side do its own job.

The words are used loosely, though. One supplier's "white label" is another's "private label", and some use "private label" for everything they make for other brands. Use the definitions below to ask precise questions, and write each supplier's answers into the contract.

How does private labeling work, step by step?

Whichever model you choose, an order moves through roughly the same stages, from first email to stock you can sell:

From first email to released stock

Where each decision is made

1. 1BriefCustomer, claim, format, target landed cost
2. 2Quotes and samplesThe same questions to every supplier, samples and a sample certificate of analysis
3. 3Contract and specificationOwnership, exclusivity, specification, failed lots
4. 4LabelArtwork, required statements, claims review
5. 5Production and testingThe batch is made and the finished lot tested against the specification
6. 6ReleaseYou compare the COA with the specification, then approve the lot

The step that's easiest to rush is the last one. A release isn't a formality: compare every result on the certificate of analysis (COA) with its specification before the lot ships to you or to customers, and send it back to the manufacturer with questions if anything is missing. Ask each supplier where its orders usually wait (artwork approval, raw materials, testing, line time) and build your launch date around the slowest step, not the quickest promise.

White label vs private label vs custom formulation

• White label. The manufacturer's stock formula, unchanged, with your label on it. Specifications and test methods already exist, so it's the fastest way to have product in hand. The trade-off is that the same formula can sell under other brands, at other prices, possibly next to yours.
• Private label, in the narrow sense. A stock base with changes: a different dose within the supplier's range, a flavor, a capsule type, or a promise not to sell your version to anyone else. Each change can mean new specifications and new tests, so ask what it adds to the price and the timeline.
• Custom formulation. A formula built to your brief: ingredients, forms, doses and format. It's the route that lets you match the doses and forms in the studies you plan to cite, and the slowest, because formulation, samples, stability work and testing come before the first batch. If it uses a new dietary ingredient, a notification must reach FDA at least 75 days before the product enters interstate commerce (FDA Q&A).

Here is how the three compare on the decisions that matter:

White label vs private label vs custom

Minimums, lead times and prices: ask each supplier, in writing

FastestWhite label

• Stock formula, your label
• Specifications and tests already exist
• The same formula may sell under other brands
• Least control over doses and forms

AdjustedPrivate label

• A stock base with changes or exclusivity
• Each change can add specs, tests and time
• Exclusive only if it is written down
• Ask who owns the changes

Most controlCustom formulation

• Built to your brief
• Doses and forms can match the studies you cite
• Formulation, samples and stability work come first
• Ownership is a contract term

A simple way to choose. Use white label to find out whether a customer and an offer work, when the claim you want to make fits a formula that already exists. Use private label when a stock base is close and one change (a dose, a flavor, exclusivity) makes it yours. Use custom formulation when the claim depends on a specific ingredient, form and dose, or when the formula itself is the reason to buy.

Minimum order quantities and lead times depend on the format (capsules, tablets, powders, gummies), the number of SKUs and flavors, stock or custom packaging, ingredient availability, testing and the manufacturer's schedule. No published figure covers your combination, so ask for the minimum per SKU and flavor, the price at two order sizes and the lead time from approved label to delivered stock, all in writing.

What do you own with a private label supplement?

You own what the contract says you own. Go through each item before you sign:

With a stock formula, assume the manufacturer keeps it: you're buying finished product, not a recipe. With a custom formula, ownership is negotiable, so negotiate it before the first batch, while you still have a choice of suppliers.

Who is responsible for a private label supplement?

Putting your name on the label puts you in the regulatory chain. This isn't legal advice, and the links go to the primary sources.

• Quality. The cGMP rule, 21 CFR Part 111, applies to anyone who manufactures, packages, labels or holds a dietary supplement (21 CFR Part 111). FDA's small entity guide covers the private label case directly: a distributor that has a manufacturer make a supplement sold under the distributor's own label "has an obligation to know what and how manufacturing activities are performed", and it must be able to decide whether the product meets its specifications and whether to release it (FDA Small Entity Compliance Guide).
• Stock you hold. If you keep inventory yourself, the same guide says the rule's holding and distributing requirements apply to you.
• Adverse events. The manufacturer, packer or distributor named on the label is the responsible person for serious adverse event reports. It must send each one it receives to FDA within 15 business days and keep records of adverse event reports for six years (21 U.S.C. 379aa-1).
• Claims. If the label carries a structure/function claim, the manufacturer, packer or distributor must notify FDA no later than 30 days after the product is first marketed (21 CFR 101.93). Agree in writing which of you files it.

In practice, keep three things for every lot: the specification, the lot's COA, and a note of who compared one with the other and approved the release. If FDA, a retailer or a payment processor ever asks how you know your product is what the label says, that file is the answer. Insurance is a separate decision; our post on supplement liability insurance covers what a policy pays for and what it leaves out.

Questions to ask a private label manufacturer

Send the same list to every supplier on your shortlist, so the answers compare like for like:

Questions for every private label supplier

• Which facility will make my product, and is it registered with FDA?
• Do you work to 21 CFR Part 111, and when was your last FDA inspection?
• Which third-party GMP audits or certifications do you hold, and where can I verify them?
• How do you confirm the identity of each dietary ingredient?
• What do you test on every finished lot, and will I get a COA for each lot?
• What is your minimum per SKU or flavor, and the price at two order sizes?
• What is the lead time from approved label to delivered stock?
• Who owns the formula, the specification and the label files?
• Is my version exclusive? For which channels, where and for how long?
• Who reviews the label, and who files the FDA notice for structure/function claims?
• What happens to a lot that fails its specification, and who pays?
• Can I audit the facility before the first order?

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The registration question is a fair one: facilities that manufacture, process, pack or hold supplements must register with FDA before they begin operating (FDA Q&A). The supplement manufacturer post goes deeper on audits, what each certification proves and how to check FDA's records on a facility.

Red flags in a private label supplier

• "FDA approved" anything. FDA does not approve dietary supplements for safety and effectiveness, and it doesn't approve manufacturing facilities on their own; it inspects them (FDA, Is It Really "FDA Approved"?). A supplier selling "FDA-approved formulas" or an "FDA-approved facility" is careless at best.
• No COA for each lot, or COAs without the test methods, the lot number or the specification next to each result.
• Pressure to skip identity testing. Part 111 requires at least one appropriate test or examination to confirm the identity of every dietary ingredient (21 CFR 111.75), so "the supplier's certificate is enough" is not an answer for those.
• Ready-made claims. Stock labels or sales sheets that say "clinically proven" or use disease language. The claims are yours to substantiate: the FTC expects the evidence to match the advertised product, and testimonials are not a substitute for research (FTC Health Products Compliance Guidance).
• An unqualified "Made in USA" offer. The FTC's standard for an unqualified claim is a product "all or virtually all" made in the US, and a qualified claim describes the mix, as in the FTC's example "Made in USA of U.S. and imported parts" (FTC, Complying with the Made in USA Standard). A supplier that offers the unqualified version without asking where your ingredients come from hasn't done the work; the Made in USA claims post covers the wording.
• Vague ownership. It won't disclose the full formula to you, or the contract is silent on who owns it.
• No answer on failure. It can't say what happens when a lot fails its specification, or it won't let you audit.

How the formula route shapes your VSL

A VSL sells a reason to believe, and with a supplement that reason is usually a mechanism: why the problem persists and why this formula addresses it. The mechanism has to be true of the formula in the bottle, at the dose in the bottle, and the unique mechanism guide shows how to find one you can support.

With white label, other brands can tell the same story about the same formula. That's fine if your edge is the customer you understand, the offer and the guarantee, but it rules out words like "proprietary" or "exclusive". With custom formulation you can build the mechanism on an ingredient, form and dose that human studies support, which makes it easier to meet the FTC's expectation that the studied ingredient or combination match the product you sell. The supplement clinical studies post shows how to check that match.

The line between a strong claim and an overclaim is often one word:

Selling a private label formula honestly

AvoidOverclaims

• "Proprietary formula" on a stock formula anyone can buy
• "Clinically proven" when only the ingredients were studied
• "Exclusive" with no exclusivity clause
• "FDA approved", in any form

UseHonest versions

• Name the ingredients and the amounts, as on the label
• Cite each study for the ingredient, form and dose it tested
• "Our formula" only when it is exclusive to you in writing
• "Made by a manufacturer that follows FDA cGMP rules", once you have checked

Show the proof where buyers look. On a RevvyScales VSL page, an ingredients content section can list each ingredient and amount exactly as the label does (content sections), and the scientific references block lists the studies behind your claims (comments and references).

What to do this week

1. Write a one-page brief: the customer, the benefit in structure/function words, the format, the channel and your target landed cost. The start a supplement company post shows how to work out that cost.
2. Shortlist three manufacturers and send each the same questions.
3. Ask for quotes at two order sizes, lead times and a sample COA, in writing.
4. Order samples and judge each one against your brief, not against the others.
5. Have a lawyer read the ownership, exclusivity and failed-lot clauses before you sign.
6. Read your first COA against the specification before you release the first lot; the certificate of analysis post shows how.