Skip to content

Coming soon. The store is not open yet.

Menu
Full Measure

Glossary

What does GMP mean on supplements?

Written by the Full Measure editorial team, which sells supplements. Approved for publication by the Full Measure owners. Updated .

Drafted with AI assistance from the sources listed below. How we write these

Quick answer

GMP stands for good manufacturing practice. For U.S. supplements it refers to FDA's current good manufacturing practice rule, 21 CFR Part 111, issued in 2007. It requires anyone who makes, packages, labels or holds a supplement to control each step so the product has the identity, purity, strength and composition it should.1,2,3

Key facts

  • The rule was phased in: by June 2008 for larger companies, June 2009 for those with fewer than 500 employees and June 2010 for those with fewer than 20.2
  • FDA wrote it so that supplements contain what their labels say and are not contaminated with substances such as pesticides or heavy metals.4
  • FDA's view is that quality cannot be tested into a product at the end. It has to be built in at every step, starting with the raw materials.2
  • FDA does not approve supplements before sale, but it periodically inspects manufacturing facilities to check that they meet manufacturing and labeling requirements.5
  • In FDA's words for drug makers, the C stands for current: companies must use technologies and systems that are up to date.6

What the rule covers

  • People, buildings, equipment and sanitation, including hygiene and pest control.1
  • Written specifications for each component and each finished batch, covering identity, purity, strength, composition and limits on contamination.7
  • Tests or examinations showing those specifications are met, including an identity check of every dietary ingredient.8
  • A master manufacturing record for each product and a batch record for each batch.9
  • Quality control review, product complaint handling, and records kept for 1 year past the shelf life date or 2 years after distribution.1

It applies to companies that manufacture, package, label or hold supplements, including imported products. Stores that hold products only for direct retail sale are exempt from the holding rules.1

GMP compliant versus GMP certified

Following the rule is a legal duty for every supplement maker, not an extra. FDA checks compliance through inspections once products are on the market, and it does not approve supplements or their labels in advance.1,3,5

Some labels add a GMP certified claim or seal. The rule itself does not issue certificates, and NCCIH cautions that words like certified or verified on a supplement do not necessarily guarantee quality or consistency.1,10

A GMP claim is also not a lot result. In a 2008 study of Ayurvedic products sold online, three in four of the products with detectable lead, mercury or arsenic made a good manufacturing practices claim.11

Where testing fits in

Testing is part of the rule, not all of it. Makers verify a statistically chosen subset of finished batches, or every batch, against selected specifications, and may rely on a supplier's certificate of analysis for some components after checking that supplier's results.8

The rule also reaches past the factory door. A qualified person must review every product complaint and investigate any that could mean a product failed its specifications.1

Questions people ask

What does cGMP stand for?

Current good manufacturing practice. FDA explains, for drug makers, that current means systems must be up to date, and that equipment which was top of the line 10 or 20 years ago may not be adequate today.6

Are all U.S. supplements made under CGMP?

They are required to be. The rule covers anyone who manufactures, packages, labels or holds a dietary supplement sold in the U.S., including imports. FDA enforces it through inspections rather than approval in advance.1,5

Does CGMP mean every batch is tested for everything?

No. The rule lets a maker test selected specifications on a statistically chosen subset of finished batches, if its documented plan shows that this confirms all specifications are met.8

See what we make

Every product shows its whole label and what its lab report covers. The store opens soon.

See the Full Measure line

Sources

  1. 21 CFR Part 111. Current good manufacturing practice in manufacturing, packaging, labeling, or holding operations for dietary supplements. Electronic Code of Federal Regulations, up to date as of October 6, 2026. Opened 2026-10-07.
  2. Food and Drug Administration. Current Good Manufacturing Practice in Manufacturing, Packaging, Labeling, or Holding Operations for Dietary Supplements; Final Rule. Federal Register 72 FR 34752, June 25, 2007. Opened 2026-10-07.
  3. U.S. Food and Drug Administration. Questions and Answers on Dietary Supplements. Content current as of August 27, 2026. Opened 2026-10-07.
  4. U.S. Food and Drug Administration. Backgrounder on the Final Rule for Current Good Manufacturing Practices (CGMPs) for Dietary Supplements. June 22, 2007. Opened 2026-10-07.
  5. U.S. Food and Drug Administration. FDA 101: Dietary Supplements. Consumer Update. Opened 2026-10-07.
  6. U.S. Food and Drug Administration. Facts About the Current Good Manufacturing Practice (CGMP). Content current as of November 21, 2025. Opened 2026-10-07.
  7. 21 CFR 111.70. What specifications must you establish? Opened 2026-10-07.
  8. 21 CFR 111.75. What must you do to determine whether specifications are met? Opened 2026-10-07.
  9. 21 CFR 111.210. What must the master manufacturing record include? Opened 2026-10-07.
  10. National Center for Complementary and Integrative Health. Using Dietary Supplements Wisely. Last updated January 2019. Opened 2026-10-07.
  11. Saper RB, Phillips RS, Sehgal A, et al. Lead, mercury, and arsenic in US- and Indian-manufactured Ayurvedic medicines sold via the Internet. JAMA. 2008;300(8):915-923. Opened 2026-10-07.

This page is information, not medical advice. Talk to your doctor or pharmacist about your own situation.