If you sell dietary supplements or nutraceuticals and you have been denied a merchant account, there is a strong chance the underwriter asked for a GMP certificate and you could not produce one. In 2026, that request has become close to universal across the high-risk processing space. This guide explains what a GMP certificate actually is, when it applies to you, and how to get a merchant account whether you hold one or not.
What Is a GMP Certificate?
GMP stands for Good Manufacturing Practice. A GMP certificate is a third-party attestation that a manufacturing facility complies with the FDA’s Current Good Manufacturing Practice regulations, codified at 21 CFR Part 111 for dietary supplements. The regulations govern the physical facility, equipment, employee training, raw-material testing, in-process controls, batch records, and finished-product testing that a manufacturer must maintain to produce safe and accurately labeled products.
The FDA enforces CGMP compliance through inspections and can take enforcement action against non-compliant facilities, but the agency does not issue GMP certificates. Certification comes from independent auditors such as NSF International, UL Solutions, USP, and the Natural Products Association. Each auditor conducts an on-site inspection, reviews records, and issues a certificate that is typically renewed annually.
You Do Not Legally Need a GMP to Sell Supplements
GMP certification applies to manufacturers, not resellers. If you purchase finished supplements from a wholesaler and sell them under your own brand or a private label, you cannot obtain a GMP certificate yourself because you are not the manufacturer. Manufacturers are legally required to operate in compliance with CGMP rules, but they are not legally required to obtain third-party certification. Certification is a voluntary proof of compliance, not a license.
But You Probably Need One to Accept Credit Cards
What the law does not require, the banking industry often does. Supplements and nutraceuticals are classified as high-risk by card-brand and acquirer risk departments because the category generates elevated chargebacks, a long history of ingredient and labeling disputes, and occasional FDA enforcement actions. To offset that risk, underwriters have pushed documentation requirements closer and closer to pharmaceutical standards.
In 2026, most high-risk acquirers that write nutraceutical accounts will ask for one of three things: a GMP certificate held by your own facility if you manufacture, a GMP certificate from each contract manufacturer you source from if you private-label, or a signed statement from your manufacturer attesting to CGMP compliance plus recent batch testing. The exact combination depends on the acquirer and the product. Ingestible products aimed at weight loss, sexual performance, cognitive enhancement, or immune support receive the highest scrutiny and almost always require a certificate from the manufacturer.
How to Get GMP Certified
If You Are a Reseller or Private-Label Brand
Contact each contract manufacturer you buy from and request a current GMP certificate along with the name of the auditor and the expiration date. Many manufacturers post the certificate on their website, but underwriting wants the document on file. If a manufacturer cannot provide one, you have two choices: switch to a certified manufacturer, or accept that many acquirers will decline your application. In the current environment, switching is almost always the right call.
If You Manufacture Your Own Products
Engage a recognized third-party auditor. NSF International runs the most widely recognized dietary supplement GMP program, but UL Solutions, USP, and the Natural Products Association all operate legitimate certification schemes. Costs vary with facility size and product range. A small single-facility supplement manufacturer should budget several thousand to low five figures for the initial audit and ongoing annual fees, plus remediation costs if the first audit identifies gaps.
Expect the process to take several months. The auditor will review your written procedures, inspect the facility, review batch and testing records, and interview staff. Most first-time applicants fail at least one area on the initial audit. Fix the findings promptly and schedule the follow-up inspection. After certification is granted, plan on an annual renewal audit and the possibility of an unannounced surveillance visit.
Getting a Nutraceutical Merchant Account
Some high-risk processors will board a nutraceutical merchant without a GMP certificate, but a willingness to approve the account does not mean the processor will treat you fairly. The nutraceutical space attracts a steady stream of low-quality acquirers who charge unreasonable reserves, freeze funds at the first sign of chargebacks, and bury early termination fees in the contract.
Before signing, gather quotes from at least three processors known to write the category, compare the discount rate, transaction fees, monthly minimums, reserve terms, chargeback fees, contract length, and early termination fee side by side. Ask each provider to put in writing the specific products and marketing claims they will and will not support. Verify the processor’s complaint record with the Better Business Bureau and with merchant communities online. A lower rate is worthless if the processor freezes your funds six months in.
Once you have a GMP certificate, or documented proof of your manufacturer’s certificate, and a processor with a clean reputation, your nutraceutical business is in a strong position to grow. The paperwork is tedious, but it is the price of playing in a category that banks consider risky. Merchants who take it seriously end up with more stable processing than competitors who try to work around it.