The NDI framework was created by DSHEA as a pre-market safety mechanism for ingredients that don't have a historical record of use in the U.S. supplement market. It applies to a wide range of ingredients that brands may not realize require notification — novel botanicals, synthetic versions of naturally occurring compounds, ingredients with new extraction methods, and ingredients at doses substantially different from historical use.
What Makes an Ingredient a "New" Dietary Ingredient
Under 21 U.S.C. 350b and 21 CFR 190.6, a New Dietary Ingredient is any dietary ingredient not marketed in the United States as a dietary supplement before October 15, 1994. The key date is October 15, 1994 — the date DSHEA was enacted.
An ingredient is not automatically "old" just because the underlying compound exists in nature. Synthetic versions of naturally occurring compounds, novel forms of existing ingredients (e.g., a new salt form, a new extraction method), and ingredients at substantially higher doses than historical use may all require NDI notification even if a related compound was on the market before 1994.
When NDI Notification Is Required
Under 21 U.S.C. 350b(a), a manufacturer must notify FDA at least 75 days before introducing or delivering for introduction into interstate commerce any supplement containing an NDI. The notification must include:
Identity of the NDI (scientific name, structure, source, method of manufacture)
Conditions of use in the supplement (dose, population, duration)
A history of use or other evidence of safety establishing that the NDI will reasonably be expected to be safe under the conditions of use
FDA publishes received NDI notifications on its website. The agency has 75 days to object. If FDA objects, it issues a "no objection" refusal that effectively functions as a bar to marketing the ingredient in that form.
Common NDI Scenarios Brands Overlook
Novel extraction methods: An ingredient that was historically used as a crude botanical may require NDI notification if sold as a highly concentrated extract not previously marketed in that form.
Synthetic versions of natural compounds: NMN, NR, spermidine, and similar compounds derived from synthetic production routes may require NDI notification even if the compound occurs naturally in foods.
Substantially elevated doses: An ingredient historically used at 50mg per day may require NDI notification if a new product uses 1,000mg per day — FDA views the significantly different dose as a materially different safety profile.
Novel botanical combinations: A combination of ingredients that individually have pre-1994 market history does not automatically qualify as having pre-1994 history in combination. Combined formulations at specific ratios may require NDI notification.
FDA's NDI Draft Guidance
FDA issued draft guidance on NDIs in 2016 (revised from the 2011 original) that significantly expanded the circumstances in which FDA believes NDI notification is required. The guidance is draft — not final rule — but it signals FDA's current enforcement thinking. Under the 2016 draft guidance, FDA indicated that the following would trigger NDI notification:
Chemically altered ingredients (including many synthetic forms)
Ingredients produced by a substantially different manufacturing process
Ingredients with no reasonable assurance of pre-1994 U.S. market presence
Consequences of Missing NDI Notification
Failure to submit a required NDI notification means the supplement is adulterated under 21 U.S.C. 342(f)(1)(B). An adulterated supplement is misbranded and subject to FDA enforcement — import alerts, warning letters, injunction, and product seizure.
The NDI status of an ingredient also affects its labeling and marketing. An ingredient used without a required NDI notification cannot be legally positioned as an established dietary supplement ingredient — it is, by definition, an ingredient without legal authorization for use in that form.
NDI compliance is ingredient-level due diligence, not just claim-level review
Claim compliance and ingredient compliance are separate legal obligations. A product with perfectly compliant structure/function claims may still be legally adulterated if it contains an NDI without proper notification. Truli's regulatory monitoring flags NDI notification status for novel ingredients and tracks FDA's published NDI notification database — identifying when a brand's ingredient of choice carries unresolved ingredient-level regulatory risk.
A note from Truli: Truli is not a law firm, and this article does not constitute or contain legal advice or create an attorney-client relationship. When determining your obligations and compliance with respect to relevant laws and regulations, you should consult a licensed attorney.
