New Dietary Ingredient (NDI) Notification

Ask a brand founder whether their supplement contains a New Dietary Ingredient (NDI), and most will say no — not because they have checked, but because they have never heard the term. The NDI rule is one of the most consequential and least-understood pieces of US supplement compliance, and ignoring it is how otherwise clean products get pulled from shelves.

Here is what an NDI is, how to tell whether your formula triggers the rule, and what your options are when it does.

What an NDI actually is

Under DSHEA (the 1994 law that defined dietary supplements in the US), a dietary ingredient is anything in the supplement's Supplement Facts panel: vitamins, minerals, herbs, amino acids, enzymes, metabolites, concentrates, and extracts.

A New Dietary Ingredient is one that was not marketed in the US before October 15, 1994. The cutoff date matters because the 1994 law grandfathered everything already on the market. Anything new since then is, in the FDA's eyes, an NDI until proven otherwise.

The list of "old" (pre-1994) dietary ingredients is not a clean, official registry. It is a working consensus based on historical evidence of marketing, maintained largely by industry trade groups. This is the first place many brands trip: they assume an ingredient is grandfathered when it is not.

When the NDI notification rule bites

If your product contains an NDI, you must do one of two things before selling it in the US:

1. File an NDI notification with the FDA, demonstrating a "reasonable expectation of safety" based on history of use, animal data, or human studies.
2. Establish that the NDI is present in the food supply in a form used for food, in which case notification is not required (this is a narrow exemption, narrowly read).

If neither is true and you ship anyway, the product is adulterated under the FD&C Act. That is not a paperwork violation — it is the legal basis for FDA seizure, import refusal, and retailer delisting.

The filing deadline is at least 75 days before first marketing. That is 75 days before you put the product on a shelf, not before you scale. Brands that learn the rule after launch have already missed the window.

Which ingredients actually trigger NDI

The surprise is not how short the list is — it is how many trendy ingredients sit on it. Common NDI-likely ingredients include:

• Botanical extracts new to the US market — many Ayurvedic and Traditional Chinese Medicine herbs first introduced commercially after 1994.
• Novel delivery forms of old ingredients — a synthetically produced form of a botanical compound, or a concentrated extract ratio never before marketed, can be an NDI even if the source plant is pre-1994.
• Specialty branded actives — the proprietary, patented ingredients marketed by ingredient suppliers. Many of these have their own NDI notifications, but you must verify the supplier has filed and that your use matches the notified conditions.
• Probiotic strains not marketed before 1994 — a large share of commercially available strains are post-1994.
• Fermented or biotransformed metabolites — even if the precursor is old, a novel metabolite can be an NDI.

The trap is that "natural" does not mean "old." A plant used in traditional medicine for centuries may still be an NDI in the US if it was not commercially marketed here before 1994.

How to know if your formula is exposed

Run this check before you finalise any formula destined for the US:

1. List every dietary ingredient in your Supplement Facts panel.
2. For each, ask: when was this first marketed in the US? If you cannot confidently place it before October 1994, treat it as a potential NDI.
3. Check the supplier's documentation. A reputable ingredient supplier should be able to tell you whether they have an NDI notification on file, or whether the ingredient is recognised as pre-1994.
4. Check the FDA's NDI notifications database. The FDA publishes the notifications they have received (not approvals — the system is notification, not approval — but the existence of a filing is public).
5. Match your use to the notification. An NDI notification covers a specific dose range, route, and population. Using the same ingredient at five times the notified dose can take you outside the notification's safety basis.

If step 2 or 5 comes back uncertain, you need regulatory counsel before you launch — not after.

What to do when an ingredient is an NDI

You have three realistic paths, in order of cost and time:

• Use a different ingredient that is clearly pre-1994. Cheapest, if a substitution preserves your formula intent.
• Use a supplier's pre-notified NDI, within their notified conditions. Faster than self-filing, but you are bound by their dose and population.
• File your own NDI notification. Most rigorous and most expensive — typically months of work and a regulatory consultant — but it gives you full ownership of the ingredient's compliance basis.

The path you do not have is "ship it and hope." NDI enforcement has accelerated; Amazon's supplement category team flags missing NDI documentation, and import refusals on NDI grounds have risen year over year.

The cost of finding out late

NDI issues surface at the worst times: in Amazon compliance review, during retailer onboarding, or when a competitor files a complaint. The cost scales with how far down the path you are:

• Caught at formula stage: swap the ingredient. Days of delay.
• Caught at artwork stage: relabel, possibly reformulate. Weeks.
• Caught after production: recall or rework. Tens of thousands of dollars.
• Caught after launch: listing suspension, FDA warning letter, potential class action. Months and legal fees.

The pattern is the same one that runs through all supplement compliance: the cost of the question goes up the later you ask it.

How to de-risk NDI before you commit volume

• Bring regulatory review into formula selection, not just label design. An ingredient that is functionally perfect but is an unnotified NDI is not usable.
• Get supplier documentation in writing — not a sales claim, but the actual NDI notification number or the pre-1994 evidence basis.
• Build the 75-day notification window into your timeline if you are filing fresh.
• If you are selling on Amazon, treat NDI as a launch prerequisite, not a follow-up — their documentation requests are now routine for supplements.

At HiGO we flag likely NDI ingredients during formulation review, because catching it before tooling is the difference between a quick substitution and a months-long delay. If you have a formula you are unsure about, that conversation is the one to have early.

Bringing a formula to market? Send us the ingredient list. We will tell you which items are NDI-likely before you commit to tooling or artwork.