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What "food grade" means on a supplement label: an undefined term, and what to read instead
There is no FDA definition of "food grade" for a dietary supplement. No agency grants it, no register lists it, and no test can confirm it, because there is no specification for a laboratory to test against. But the interesting part is not that the phrase is undefined — plenty of marketing words are. It is where the phrase came from. "Food grade" is borrowed language, and it is borrowed from three entirely real regulatory systems: GRAS flavouring status, the Food Chemicals Codex, and the rules governing materials that touch food without being food. Each of those is precise. The trouble is that a bottle saying "food grade" never tells you which one it means — and two of the three are not about the contents of a supplement at all.
Is "food grade" an FDA-defined term for supplements?
No. FDA maintains no definition of "food grade" for dietary supplements, issues no food-grade certificate, and keeps no list of products entitled to use the phrase.
The way to satisfy yourself of this is to look at what FDA does define. Its dietary supplement labeling guidance is detailed and specific: a label must carry a statement of identity, a net quantity of contents, a Supplement Facts panel formatted under 21 CFR 101.36, an ingredient declaration, and the name and place of business of the manufacturer, packer or distributor. That corpus of guidance runs to chapters covering nutrition labelling, claims, and ingredient statements. "Food grade" appears in none of it as a defined term. A phrase that is genuinely regulated tends to leave a paper trail; this one leaves none.
This puts it in the same family as the ungraded grade words taken apart on oil of oregano vs oregano essential oil — but not in the same position, and the distinction is the whole reason this page is worth reading rather than skimming. Here is the difference, stated once and then developed for the rest of the page.
How is this different from "therapeutic grade"?
"Therapeutic grade" names a grading system that does not exist; "food grade" names grading systems that do exist, and then declines to say which one it means.
No agency or independent body grades essential oils therapeutically — there is no scale, no scoring, no assessor, and the best-known version of the phrase is a trademark held by a single company rather than a third-party certification. It is an empty term in the strict sense: there is no referent behind it.
"Food grade" is a different failure. Behind it sit a federal safety status, an international compendium of ingredient specifications, and a body of food-contact regulation, all of them genuine, published and checkable. The phrase simply does not commit to any of them. It is not an empty term. It is an unspecified one — the same shape as "third-party tested" on the third-party vs in-house testing page, which names an event that may well have happened while leaving open who did it, to what, and how often. The practical consequence is the same in both cases: a phrase you cannot check cannot be used to compare two bottles. But it also means the fix is easy, and the fix is the four-second test at the end of this page — a real grade claim cites something.
What is the actual grading standard for food ingredients?
It is the Food Chemicals Codex, published by the United States Pharmacopeia — a compendium of internationally recognised standards for the identity, purity and quality of food ingredients.
The FCC contains more than 1,200 monographs covering food-grade chemicals, processing aids, food ingredients including vegetable oils, flavouring agents, colourants, preservatives, vitamins and functional ingredients. Each monograph is a set of tests and specifications — identification, assay, impurities, and further tests describing purity and quality — for a single ingredient. USP acquired the rights to the FCC in 2006 and has developed it through public participation since, aiming at biennial publication, and FDA has incorporated editions of the FCC by reference into its food additive regulations, which is about as far from "marketing term" as a document gets.
Notice what a monograph is, structurally: a named test, a stated limit, and a number the material must return. That is the same three-column shape a usable certificate of analysis takes, described in detail on what a certificate of analysis shows. Which produces the sharpest observation on this page. A genuine grade claim names a monograph — "USP grade", "FCC grade", "meets FCC specifications" — because a grade is meaningless unless you can look up what it requires. A bare "food grade" is a grade claim with the reference deleted. The grading system it is reaching for is sitting right there, published, in its ninth edition and beyond, and the label has chosen not to cite it.
Does GRAS status mean an oil is approved for swallowing?
GRAS is a statement about a substance in a particular use, not a property the substance carries with it — and the use in question here is flavouring, in the amounts customary in food.
This is the assumption the phrase "food grade" most often smuggles in, so it is worth being exact. Under 21 CFR 182.20, essential oils, oleoresins (solvent-free) and natural extractives including distillates, derived from a long list of named botanicals, are generally recognized as safe for their intended use. Origanum species appear on that list. That is a real regulatory fact and this page will not diminish it.
But read the sentence's grammar. GRAS status attaches to a substance in a use — which is why "this oil is GRAS" is an incomplete sentence, in the way that "this is faster" is incomplete. The use contemplated by 182.20 is as a flavouring agent, at the small quantities customary in food. It is not a finding about a supplement serving, it is not an evaluation of a concentrated oil taken undiluted, and it is not an approval of any particular product. The same oil can be GRAS as a flavour and simply unaddressed as a serving. Those are two different questions, and a listing that answers the first has not been asked the second.
There is a second gap, and it is the one that matters most in a shop. GRAS is a status of a substance; it says nothing whatever about the bottle. Two products can both contain a GRAS-listed oregano oil while differing entirely in species identity, carvacrol content, contaminant levels, how much oil a serving delivers, and whether anyone ever measured any of it. Those are questions for a Supplement Facts panel, a specification and a lot-matched test result — the subject of how to read a Supplement Facts panel and what "GMP certified" means.
Where is "food grade" actually a precise term?
In the world of things that touch food without being food — machinery, lubricants, tubing, gaskets and packaging — where it has a working definition that is genuinely useful.
Indirect food additives and food-contact substances are regulated largely under 21 CFR parts 174 to 179, which set out permitted polymers, adhesives, coatings and components for materials that hold, manufacture, package or transport food. And in industrial practice the phrase gets sharper still: a food-grade lubricant means one registered as NSF H1 or certified to ISO 21469, suitable for use where incidental contact with food may occur. That is a real registration, granted by a named body, checkable in a public listing.
Sit with that for a moment, because it is the most under-stated fact about this phrase. "Food grade" is at its most rigorous when it is describing the grease in a machine. Its home category is proximity to food, not composition as food — the term exists precisely because a bearing lubricant is not food and needs a way of saying it may safely be near some. Move it onto the contents of a supplement bottle and it is borrowing authority from a category it has stepped out of. There is nothing dishonest in the borrowing; the phrase drifted the way industrial vocabulary usually drifts. But a shopper reading it as a quality tier is reading a food-contact term as an ingredient specification, and those are different kinds of claim about different objects.
How do the grade words compare?
Ranked from weakest to strongest, the difference between them is not how impressive they sound but whether anything is named that you could go and look up.
| Phrase on the label | Who defines it | What it actually covers | Can you check it? |
|---|---|---|---|
| "Therapeutic grade" | Nobody — no grading system for essential oils exists; the best-known form is a company trademark | Nothing. There is no scale and no assessor | No — nothing to check |
| "Food grade" | Nobody, as used on a supplement. The phrase alludes to GRAS, the FCC and food-contact rules without naming any of them | Unspecified. The systems behind it are real; the claim does not say which applies | No — until it cites something |
| "GRAS" / listed under 21 CFR 182.20 | FDA, by regulation | A substance in a stated use — for 182.20, flavouring at quantities customary in food. Not a product, not a serving | Yes — the list is public, but read the use |
| "NSF H1" / ISO 21469 | NSF; ISO standard | Lubricants and non-food compounds suitable for incidental food contact — machinery, not ingredients | Yes — registered and listed |
| "Meets FCC monograph" / FCC grade | United States Pharmacopeia, in the Food Chemicals Codex | Identity, purity and quality specifications for a named ingredient — 1,200+ monographs of tests, limits and assays | Yes — look up the monograph |
| mg of a named compound per serving | The company, on a regulated Supplement Facts panel under 21 CFR 101.36 | What one serving of this product delivers — the only unit two different botanical labels share | Yes — an assay can confirm or refute it |
Read down the last column and the pattern is plain: the claims get more useful as they get less flattering. A grade word is designed to be memorable; a monograph reference and a milligram figure are designed to be verified. Only one of those designs survives contact with a laboratory.
What should you read on the label instead?
Turn the bottle over and read the Supplement Facts panel — four lines on it carry more information than every grade word on the front combined.
1. The serving size. FDA guidance defines one serving of a dietary supplement as the maximum amount the label recommends per eating occasion, not an average — so a label reading "take one to three" must declare a serving of three, and every figure beneath it describes three. Two products both printing 500 mg can therefore differ threefold with nothing but the serving-size line to tell them apart.
2. The amount per serving of a named compound. Botanicals have no established Daily Value, so the panel carries the footnote "Daily Value not established" and two botanical labels share no percentage at all. What they can share is milligrams of a specifically named substance. This is also why a headline percentage is weaker than it looks: a percentage is a ratio inside the oil and says nothing about how much oil a serving contains.
3. The Latin binomial and the plant part. A supplement panel must identify the part of the plant used for a botanical, which a food panel never does. This is the check that catches the most consequential substitution in this category: true oregano oil is distilled from the leaf and aerial parts of Origanum vulgare, in the mint family, while Lippia graveolens — sold as Mexican oregano — belongs to an entirely different plant family. "Oregano" is a culinary word, not a taxonomic one.
4. The "Other ingredients" line beneath the panel. Non-dietary components appear here by common name in descending order by weight, which makes the first name on that line the largest non-active component in the bottle. On a liquid oil this is the single most revealing line on the label, because it tells you how much of what you are buying is carrier.
All four of those are facts a laboratory could confirm or refute. That is the property they share, and it is exactly the property a grade word lacks. The full walk-through is on how to read a Supplement Facts panel, and the buyer's version of the same argument is on how to choose a quality oregano oil.
What does this mean for a bottle of WaveDrops?
It means the label leads with the things a test could settle, rather than with a word that no test could.
Each 2-drop serving is stated at about 18 mg of carvacrol and roughly 0.9 mg of thymoquinone — a named compound and a mass, which is the form an assay result takes and the form a specification takes in an FCC monograph. That is a falsifiable sentence: a laboratory can measure it and find it right or find it wrong. No laboratory can measure "food grade", because there is no limit for the result to be compared against, which is the point made at length on what a certificate of analysis shows — a test needs a target.
The second half follows from point four above. WaveDrops carries no filler carrier oil — no olive, sunflower, soybean or corn oil added to make up volume. The wild-harvested Greek Origanum vulgare oil and the cold-pressed Nigella sativa oil are both declared actives, so every millilitre in the 0.34 fl oz (10 mL) amber dropper is the two oils themselves, giving about 200 two-drop servings. That matters here for a specific reason rather than a general one: when most of a serving is diluent, the concentration a person actually receives depends on how generously the diluent was added, and any headline figure about the oil stops describing the serving. The product is made in a GMP-certified facility — described, as on the GMP page, as a floor that every US supplement manufacturer has been legally obliged to meet since 2010, rather than dressed up as a distinction.
And the honest closing note, since this page has spent its length arguing that a phrase proves less than people assume: the absence of "food grade" on a label is not evidence of anything either. Plenty of carefully made products never print the phrase, and plenty of ordinary ones do. It is not a warning sign in either direction — it is simply a sentence with no content, and the four seconds spent reading it are better spent on the panel.
Three claims about "food grade" this page refuses
Stating what is not true is part of stating what is.
"Food grade means the FDA approved this product for consumption." FDA does not approve dietary supplements before they go on sale at all, and it grants no food-grade designation to approve them with. The nearest real thing — GRAS listing under 21 CFR 182.20 — is a safety status for a substance in a stated use, published as a regulation, and is not an approval of any company's finished product.
"A food-grade essential oil is safe to take internally in any amount." The phrase is not a dosing instruction and carries no serving information. Concentrated essential oils are not intended to be taken neat, the correct amount is the one printed on the product's own label, and the relevant guidance for any specific bottle is that bottle's directions — covered on how to take oregano oil drops and how to dilute it. Anyone who is pregnant, nursing, taking medication or managing a medical condition should speak to their healthcare provider first; see who should not take oregano oil.
"No food-grade claim means the product is not fit to swallow." The phrase is optional, undefined and unregulated, so its presence and its absence are equally uninformative. What tells you a company has taken the position that a liquid is meant to be consumed is a Supplement Facts panel — a regulated disclosure formatted under 21 CFR 101.36, complete with a "Dietary Supplement" statement of identity and a US name and place of business. That is the difference set out on oil of oregano vs oregano essential oil.
Refusing these three is not an argument that everything behind the phrase is worthless. The GRAS list is a real regulation, the Food Chemicals Codex is a serious compendium that FDA itself has incorporated by reference, and NSF H1 registration does genuine work in a factory. The argument is narrower and, we think, more useful: each of those systems is checkable precisely because it names something, and "food grade" on a supplement bottle names nothing. Which gives the four-second test this page exists to hand over — if a label claims a grade, look for what it cites. A grade with no reference is not a grade.
Related reading: how to read a Supplement Facts panel, what "GMP certified" means on a supplement label, what a certificate of analysis shows, third-party vs in-house testing, and what "Non-GMO Project Verified" actually verifies. Or return to the WaveDrops homepage.
WaveDrops describes traditional use and structure/function support only. Terms like "antioxidant" and "immune-wellness support" describe how these compounds are traditionally understood, not a promise to diagnose, treat, cure, or prevent any condition. Always follow the serving printed on the label, keep the product out of reach of children, and consult your healthcare provider before use if you are pregnant, nursing, taking medications, or managing a medical condition.
These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.