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How to Start a Research Peptide Brand With a Private Label Supplier: A Business Set-Up Checklist

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Starting a research-use-only (RUO) peptide brand on private label supply is a sequence of business set-up steps: a legal entity, a tax identity, tax registration, a supplier, written terms, label content, buyer checks and records. This guide lists those steps in order and gives the options at each one. It covers business set-up only. It does not choose products, and it says nothing about audiences or sales channels. It is not legal advice.

This guide is for people setting up a research-supply business that will sell under its own brand to research buyers.

1. Which business entity, and how does an EIN fit in?

The IRS page on business structures says: “When beginning a business, you must decide what form of business entity to establish. Your form of business determines which income tax return form you have to file.” It lists the sole proprietorship, partnership, corporation, S corporation and limited liability company (LLC), and notes that an LLC “is a business structure allowed by state statute.”

Options at this step:

  • Pick a structure after reading the IRS page and the Small Business Administration page it points to.
  • Form the entity with the state first, where the structure is a corporation or LLC. The IRS page on getting an employer identification number (EIN) says: “If you are creating a corporation or LLC, form your entity through the secretary of state before you apply for an EIN. If you don’t form your entity with the state first, your EIN application may be delayed.”
  • Apply for the EIN through the IRS online tool, or by phone, fax or mail. The IRS page says the online tool is for applicants who meet all four conditions it lists, among them a domestic organization whose principal place of business is in the U.S. or U.S. territories, and that “You can apply for only 1 EIN per responsible party per day.”

2. What do sales-tax registration and resale certificates involve?

This guide describes one state’s pages, the Texas Comptroller’s, and no more. The Texas Comptroller’s permit page says to complete its application “if you are engaged in business in Texas; and you sell or lease tangible personal property in Texas; or you sell taxable services in Texas.” Its resale-certificate page says: “A taxable item that is purchased for resale is exempt from sales or use tax if the seller accepts a properly completed Form 01-339, Texas Sales and Use Tax Resale Certificate (PDF), instead of collecting the sales tax due,” and that the certificate “should be retained in the seller’s books and records for four years.”

Those statements are Texas statements. A business operating elsewhere can look for its own state tax agency’s pages; this guide cites no other state. Options: read the tax agency pages of each state the business sells into or operates in; where the Texas permit page’s conditions apply, complete the Texas application; ask the supplier what resale documentation it asks for, and keep a copy on file.

3. How do I vet a supplier?

A supplier can be assessed on paper before any order. Questions a brand can put to a supplier, and ask to have answered in writing:

  • Where does each manufacturing step happen?
  • Is every lot tested by an outside laboratory, and does each lot have its own certificate of analysis (COA)?
  • Which lot records are kept, and for how long?
  • Who controls label content and artwork approval?
  • How are changes, complaints and withdrawals handled?
  • What does the supplier ask of buyers by way of verification, and what does it expect of the brand?

4. What goes into a written supply agreement and quality agreement?

This guide keeps two documents apart. A supply agreement can hold commercial terms: ordering, lead times, reorders, ownership of labels and components, and what happens if orders stop. A quality agreement can hold quality terms: specifications, change control, per-lot testing, records, complaints and who writes, approves, prints and applies the label. The guide What a Quality Agreement With a Peptide Manufacturer Should Cover lists what such an agreement can settle.

5. What do minimums mean for a first order?

A supplier may set a minimum order quantity because fixed work, such as setup, testing and label printing, is spread over a run. How White Label Peptide Suppliers Set Minimum Order Quantities lists the cost drivers and the questions a brand can ask, including whether a minimum counts per SKU, per order or per label design.

6. Private label or white label?

As this guide uses the terms, white label means a stock product with the brand’s name added to a prepared label layout, and private label means the product, label design or packaging is made custom for the brand. Suppliers may use the words differently, so the written terms can say which one applies to each item. The choice can affect the label work, the minimum and who approves what.

7. What is agreed about label content?

Label wording is a point to settle in writing with the manufacturer before printing. Two federal texts name label content for a drug within their scope. This guide does not say whether either applies to a given product.

  • 21 CFR 312.160(a)(1)(i): “A person may ship a drug intended solely for tests in vitro or in animals used only for laboratory research purposes if it is labeled as follows: CAUTION: Contains a new drug for investigational use only in laboratory research animals, or for tests in vitro. Not for use in humans.” Paragraph (a)(2) adds that the shipper “shall use due diligence to assure that the consignee is regularly engaged in conducting such tests and that the shipment of the new drug will actually be used for tests in vitro or in animals used only for laboratory research.” The section’s scope is a drug shipped under it.
  • 21 CFR 201.1(a): a drug or drug product in finished package form “is misbranded under section 502 (a) and (b)(1) of the act if its label does not bear conspicuously the name and place of business of the manufacturer, packer, or distributor.” Paragraph (h)(5) says that “If the distributor is named on the label, the name shall be qualified by one of the following phrases”, including “Manufactured for ______” and “Distributed by ______”.

Other label items a brand and manufacturer can agree on, as options and not as a list of what either section requires: product identity as the product record gives it, quantity, a lot number that ties to the lot COA, a plain research-use-only statement, storage wording, and the brand’s name and a way to reach it.

8. How are buyers verified and attestations handled?

A brand can decide before its first sale how it checks that a buyer is a business buying for research use, and what the buyer states in writing. Options include a business-identity check, a signed attestation of the buyer’s intended research use, and a record of each. A separate guide on buyer verification is in preparation and is not linked here. An attestation is a record; this guide does not treat it as settling who is responsible for what happens later.

9. Which records does a brand keep?

Options for a records set-up, which the brand can agree with the supplier:

  • Lot records that tie each shipped unit to a lot.
  • The COA for each lot, kept on file with the lot record.
  • Shipment records: who received what, which lot, and when.
  • Buyer files from step 8.

For comparison only, 21 CFR 312.160(a)(3) says a person who ships a drug under paragraph (a) “shall maintain adequate records showing the name and post office address of the expert to whom the drug is shipped and the date, quantity, and batch or code mark of each shipment and delivery,” kept “for a period of 2 years after the shipment” for shipments under (a)(1)(i). That is the text of one section, for a drug shipped under it.

10. What does 21 CFR 201.128 say about how intent is shown?

This guide gives no copy advice. It states one principle from the text. 21 CFR 201.128 says that “The words intended uses or words of similar import in §§ 201.5, 201.115, 201.117, 201.119, 201.120, 201.122, and 1100.5 of this chapter refer to the objective intent of the persons legally responsible for the labeling of an article (or their representatives). The intent may be shown by such persons’ expressions, the design or composition of the article, or by the circumstances surrounding the distribution of the article.” It adds that objective intent “may, for example, be shown by labeling claims, advertising matter, or oral or written statements by such persons or their representatives.” Under that text, intent may be shown by such persons’ expressions, labeling claims, advertising matter, oral or written statements, the design or composition of the article, or the circumstances surrounding its distribution; the text does not confine the evidence of intent to what the label says. This guide does not say whether 201.128 applies to a given product.

Last reviewed: 2026-11-13

References

Frequently asked questions

Does this guide say whether 21 CFR 312.160 or 201.1 applies to a product?

No. It names what each section says and the scope each states, and does not decide whether either applies to a given product. It is not legal advice.

Does a resale certificate cover every state?

This guide cites one state's pages only, the Texas Comptroller's, and describes what those pages say. It makes no statement about other states.

Is a supply agreement the same as a quality agreement?

They are kept as separate documents in this guide. The supply agreement carries commercial terms such as minimums and reorders, and the quality agreement carries quality terms such as specifications, testing, records and label responsibility.