What “Grass-Fed” Legally Means on a Supplement Label

Federal law gives “grass-fed” no single enforced meaning on a supplement label. USDA withdrew its standard in 2016, meat labels are reviewed case by case, and the FDA does not approve supplement labels in advance. The claim is only as strong as its paperwork.

This page explains who decides what “grass-fed” means, what a certificate adds, and what we can and cannot show for our own capsules. Our piece on why New Zealand origin matters covers the farming side; this one stays on the label and the law, and it says where our own proof stops.

The short version

No federal rule defines “grass-fed” for a capsule. USDA withdrew its standard in 2016, the FDA oversees supplements without pre-approving labels, and certification is voluntary. A third-party seal is the strongest proof; named supplier documents are weaker but checkable. The word on its own proves nothing.

Is there a legal definition of “grass-fed”?

Not one that is enforced across supplements. On January 12, 2016, USDA’s Agricultural Marketing Service withdrew its voluntary grass-fed standard, saying it lacked the authority to define the term. No federal definition replaced it, so each brand writes its own or points to a certifier’s.

Producers who had used the USDA standard were given 30 days to switch to another recognized one. The agency also warned that a claim verified by USDA might not be approved by the Food Safety and Inspection Service or the FDA.

Why “grass-fed” can still appear everywhere

Because the word is not reserved. A brand may print it as long as the claim is truthful and not misleading, and the proof is whatever the brand holds. That can be a signed rearing protocol, a certificate, a supplier’s description, or nothing you can see.

Who oversees a grass-fed claim on a capsule?

It depends on the product. On fresh and packaged meat, USDA’s Food Safety and Inspection Service reviews animal-raising claims case by case, using the producer’s documentation. A capsule sold as a dietary supplement is an FDA product, and the FDA states that label approval is not required to import or distribute one.

The FSIS guideline published on September 10, 2024 says the agency reviews animal-raising claims based on the production protocol submitted with the label application, and “strongly encourages” third-party certification. That applies to meat. For supplements, the FDA Dietary Supplement Labeling Guide lists topics such as “organic” and “country of origin” in its index but has no entry for grass-fed. The guide dates from 2005, and we found no newer FDA definition.

The NIH Office of Dietary Supplements consumer fact sheet makes the same point from the other side: the FDA does not determine whether supplements are effective before they are marketed. A label is the brand’s statement, not a verified one.

What does a third-party grass-fed certification add?

An outside auditor checks the claim against a published standard. The American Grassfed Association, for example, requires grass and forage only from weaning, raising on pasture without confinement, no antibiotics or added hormones, and outside inspections at least every 15 months. Animals must be born and raised on American family farms.

That last requirement matters here. New Zealand cattle could not carry that particular seal, whatever they eat, because the standard is tied to American farms. That is a rule about geography, not a judgment on the animals. It does mean New Zealand product needs a different route to proof, such as a certifier that audits there or supplier documents you can read.

Does grass-fed change what is inside the animal?

Sometimes, in measurable but modest ways. A 2010 review in Nutrition Journal found grass-based diets can raise conjugated linoleic acid, omega-3 fats per gram of fat and some antioxidants in beef, while noting that grain-fed beef can reach similar intakes through fattier cuts.*

The review by Daley and colleagues covered beef muscle, mostly fat composition, and reported variable effects on palatability. It did not study freeze-dried organ powder in capsules, and we know of no study that has. So we do not turn the label word into a nutrient claim: it tells you about diet and origin, and the milligrams on the panel tell you about dose.

What do Women Bloom’s own documents say about grass-fed?

All five organs come from New Zealand grass-fed cattle. Four of the documents on our Lab Tests page state it directly; for the heart, the grass-fed statement is on a separate certificate, while its certificate of analysis records origin and inspection. They are supplier documents, and we describe them that way.

The liver document reads “Grass-fed, free-range, born and raised in New Zealand,” the kidney “Pasture-fed New Zealand prime beef,” the uterine tissue “Grass-fed, free-range New Zealand bovine,” and the ovary specification “New Zealand grass-fed.” The heart’s certificate of analysis records inspection by the New Zealand Food Safety Authority, and its grass-fed statement comes on a separate certificate. You can read the published documents, with supplier and batch numbers, on the Lab Tests page.

That is the point of publishing them. A beef organ supplement that publishes a supplier document for each of its five organs can show you who stands behind each claim and which document carries it. The doses themselves are on the Supplement Facts page, and our guide to reading a certificate of analysis explains what each kind of document does and does not prove.

How can you check a grass-fed claim on any supplement label?

Ask four things: who defines the term, whether a certifier is named, whether each ingredient has its own document, and whether the wording covers diet, origin or both. A label that answers none of them is giving you a word, not evidence.

Start with the certifier, because a named seal with a public standard is the one thing you can check in a minute. If there is none, look for the supplier and a batch number, which is what makes a claim traceable to a person. Our guide on how to choose a beef organ supplement puts these checks next to the others worth making.

Grass-fed, grass-finished and pasture-raised are not the same sentence

Each describes a different stretch of an animal’s life, and a label rarely says which one it means. If the exact wording matters to you, ask the brand whether grain was fed at any stage and whether the claim comes from the supplier or from an audit.

Last reviewed: 16 October 2026. This article is general information, not medical or legal advice. Talk to your physician before starting any supplement.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.