If you spend any time vetting the supplements you take, sooner or later you run into three letters: NDI. They turn up in industry headlines, on regulatory pages, and in the fine print companies point to when they want to show an ingredient is above board. The term sounds like bureaucratic shorthand, and it mostly stays behind the scenes — but it quietly shapes which ingredients can legally end up in the bottle on your shelf.
So what does it actually mean? You probably want to know what NDI stands for, why a date in 1994 keeps coming up, whether the label means the FDA signed off on a product, how it differs from the GRAS status you have seen on food, and — most practically — what any of it means for what you choose to buy.
At MitWellness, we field these questions from customers who want to understand the rules behind the botanicals they are considering, so we put the answers in one place.
Here is the plain-English version, from the definition down to what to look for on a label.
What does NDI stand for, and what makes a dietary ingredient "new"?
NDI stands for new dietary ingredient — a supplement ingredient that was not sold in the United States before a specific cutoff in 1994, which is what makes it "new" in the eyes of federal law. To make sense of that, it helps to take the three-letter term itself, the statute that created the category, and the single date that draws the line.
What does NDI stand for?
NDI stands for "new dietary ingredient," a category defined in federal law for ingredients used in dietary supplements. It is not a marketing badge or a quality grade. It is a legal classification that determines what a company has to do before it can put an ingredient into a supplement and sell it. An ingredient is either "new" under the law or it is not, and that status decides the path to market.
Which law created this category?
The category comes from the Dietary Supplement Health and Education Act of 1994, known as DSHEA, which amended the Federal Food, Drug, and Cosmetic Act and added a provision now found at section 413 (codified at 21 U.S.C. 350b). The FDA later spelled out the procedures in its regulation at 21 CFR 190.6, issued in 1997. Together, these set the rules for how a brand-new supplement ingredient is supposed to enter the market and what the company must tell the government first.
Why does October 15, 1994 matter?
Marketed in the United States as a dietary ingredient before October 15, 1994, that single date separates ingredients with a long pre-existing track record from those the law treats as needing a fresh look at safety. You will see this date referenced constantly in supplement regulation, because almost every question about an ingredient's status eventually circles back to which side of it the ingredient sits on.
How does a new dietary ingredient actually reach the market?
For most ingredients that postdate that 1994 line, a company has to file a premarket safety notification with the FDA before selling — at least 75 days ahead — laying out why the ingredient is reasonably expected to be safe. The pieces worth understanding are what that notification contains, what it does and does not mean, and what happens when a company ignores it.
What is an NDI notification (NDIN)?
An NDI notification, often shortened to NDIN, is a safety filing that a manufacturer or distributor submits to the FDA at least 75 days before introducing the ingredient, presenting the evidence behind its conclusion that the ingredient is reasonably expected to be safe as described on the label. The filing covers the ingredient's identity and composition, how it is manufactured, and its safety basis — which can include a history of use, published literature, and the company's own studies. For botanical ingredients, the FDA expects the plant's Latin binomial name, including the author citation, so there is no ambiguity about exactly which species is involved. Notifications are typically submitted to the FDA's Office of Dietary Supplement Programs through its electronic portal.
| An NDI notification at a glance | Detail |
|---|---|
| Who files it | The ingredient's manufacturer or distributor |
| Who receives it | The FDA's Office of Dietary Supplement Programs |
| When | At least 75 days before the ingredient enters the market |
| What it shows | The basis for concluding the ingredient is reasonably expected to be safe |
| Typical contents | Identity and composition, manufacturing description, safety evidence; for botanicals, the Latin binomial name |
| Legal basis | Section 413 of the FD&C Act (21 U.S.C. 350b); 21 CFR 190.6 |
Does a notification mean the FDA approved the ingredient?
No — a notification is not an approval. The FDA does not pre-approve dietary supplements or their ingredients before they go on sale; instead, it reviews the safety notification and can raise objections, but acknowledging a filing is not a sign-off, an endorsement, or a guarantee. This is one of the most common misunderstandings about the category. A company can correctly state that it filed a notification while it would be misleading for anyone to claim the agency "approved" the ingredient, because that kind of premarket approval simply is not part of how supplements are regulated.
What happens if a company skips the notification?
If an ingredient requires a notification and the company does not file one, the supplement is considered "adulterated" under the law — a serious status that applies regardless of whether the product would otherwise be safe. In other words, the failure to notify is itself the violation. That is a meaningful reason to favor companies that take ingredient documentation seriously, because the consequence of cutting the corner falls on the product, not just the paperwork.
Which ingredients are are variable for notifications?
Not every ingredient needs a filing: two paths let one skip notification — being on the U.S. market before the 1994 cutoff, or already existing in the food supply in a form that has not been chemically altered. The points worth knowing are what an "old" ingredient is, how the food-supply exemption works, and why there is no official list to check an ingredient against.
What is an "old dietary ingredient" (ODI)?
An old dietary ingredient, sometimes called a grandfathered ingredient, is one that was already marketed in the United States before October 15, 1994; it is not a new dietary ingredient and does not require a notification. That is an exemption from the notification requirement, not a determination that the ingredient is safe. The catch is that the ingredient has to be essentially the same as what was on the market back then — a meaningful change to its identity, source, or processing can push it back into the new category. So "it has been around forever" is not automatically the end of the conversation; the specific form matters.
What about ingredients already in the food supply?
An ingredient that has been present in the food supply as an article used for food, and has not been chemically altered, can generally be used in a supplement without a separate notification. This is the second exemption written into the statute, and the operative phrase is "not chemically altered." Taking a substance people already eat and processing it in a way that changes its chemistry can move it out of the exemption and back into territory where a filing is expected. The line between ordinary processing and chemical alteration is exactly where a lot of industry debate lives.
Is there an official list of grandfathered ingredients?
No — the FDA has never published an authoritative list of pre-1994 ingredients, and has indicated it does not intend to, which means companies have to document grandfathered status themselves. This has been a point of friction since DSHEA passed. Trade associations assembled their own lists of ingredients they believed were on the market by the cutoff, but the agency has generally wanted ingredient-specific evidence, and decades later much of the original paperwork — old labels, catalogs, advertisements — is hard to produce. The practical result is that "old" status often has to be argued and backed up rather than simply looked up.
How is an NDI different from a GRAS ingredient?
The two get mixed up because both deal with ingredient safety, but they belong to different systems: GRAS is the pathway for substances added to conventional foods, while the new-ingredient route governs dietary supplements. The contrast comes down to which products each one covers, who makes the safety determination, and what kind of evidence it relies on.
What does GRAS mean, and how does it differ?
GRAS stands for "generally recognized as safe," a status for food substances whose safety is supported by published data and broad expert agreement; it applies to conventional foods, whereas the supplement notification pathway applies to dietary supplement ingredients. A key difference is the kind of evidence each allows: a GRAS conclusion rests on publicly available science that experts widely accept, while a supplement notification can lean on a company's own proprietary or unpublished safety data. The table below lines up the basics.
| New dietary ingredient (supplement pathway) | GRAS (food pathway) | |
|---|---|---|
| Applies to | Ingredients in dietary supplements | Substances in conventional foods |
| Governing law | DSHEA / FD&C Act section 413 | Food-additive provisions of the FD&C Act |
| Action required | Premarket notification to the FDA (when not exempt) | A safety determination; FDA notification is voluntary |
| Type of evidence | May include proprietary or unpublished data | Publicly available data and broad expert consensus |
Can the two overlap?
Yes — an ingredient that has actually been used in the food supply — which is often also GRAS — may not need a separate notification., which is one reason the two categories blur in practice. A substance can have a history on the food side that carries over when it is used in a supplement. That overlap is useful to know about as a buyer, because it explains why a perfectly legitimate ingredient might reach the market through one route rather than the other.
What does any of this mean for you as a buyer?
For shoppers, the takeaway is straightforward: this framework is the reason a credible company can explain the regulatory standing of what it sells, and a reason to favor brands that are willing to do so. Two things are worth holding onto — how the rules touch the shelf, and what to actually look for before you buy.
How does the framework affect what is on the shelf?
It means each ingredient in a reputable supplement should have a lawful basis for being there — long-standing use, a history in the food supply, or a filed notification — even though none of those is the same as the FDA approving the product. Understanding this keeps your expectations accurate. You are not looking for a government seal of approval, because that is not how the category works; you are looking for a company that knows the standing of its ingredients and can tell you about it without dodging.
What should you look for in a botanical supplement?
Look for the signals that a company takes ingredient identity and quality seriously, rather than for any single regulatory buzzword on the front of the label. A few worth checking:
- Clear labeling. Each ingredient is named, and for botanicals you can see the plant's botanical (Latin) name and the part used, not just a vague "proprietary blend."
- Sourcing transparency. The company is open about where an ingredient comes from and how it is processed.
- Testing documentation. Records of identity and purity testing are available when you ask for them.
- Straight answers. Questions about an ingredient's regulatory standing get a clear response instead of a brush-off.
- A real track record. The company has a history and genuine contact information for questions and concerns.
Choosing supplements with confidence
Stripped of the jargon, an NDI is a legal classification, not a quality grade: it marks an ingredient the law treats as new because it postdates October 15, 1994, and it usually triggers a safety notification to the FDA before the ingredient can be sold. A notification is not an approval, "old" ingredients and certain food-supply ingredients are exempt, there is no official master list to consult, and GRAS is the food-world cousin of the same safety idea. The framework quietly rewards companies that know exactly what is in their products and can speak about it plainly.
That is the standard we hold ourselves to at MitWellness. We focus on botanical products we can stand behind, we care about ingredient identity and purity, and we believe you deserve clear, honest answers about what you are putting in your body. The more you understand the rules, the easier those answers are to judge — which is exactly how it should be.
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.