NMN · Labeling Standards and Cross-Border Compliance

Abstract

β-Nicotinamide Mononucleotide (NMN) has continued to attract attention in the dietary supplement markets of Japan, China, Europe, and the United States in recent years. As the market has expanded, controversies surrounding labeling standards for this ingredient and cross-border compliance risks have become increasingly prominent. This paper examines three dimensions — ingredient content labeling standards, product label regulatory requirements, and cross-border purchasing compliance — to outline the core compliance logic under Japan's current regulatory framework, providing actionable reference guidance for consumers, procurement personnel, and industry practitioners. This paper addresses only verifiable regulatory facts and standards; it does not involve any health efficacy or medical claims.

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I. Overview of Japan's Regulatory Framework for Dietary Supplements

In Japan, NMN products are currently classified as general foods or Foods with Function Claims, rather than pharmaceuticals or medical devices. This classification directly determines the applicable regulatory framework for labeling standards.

The principal applicable laws include:

• Food Sanitation Act: Sets safety standards for food production and distribution, and establishes the basic obligation to refrain from misleading statements in labeling.
• Health Promotion Act: Prohibits exaggerated health claims for food products and restricts efficacy statements for products other than Foods for Specified Health Uses (FOSHU).
• Act against Unjustifiable Premiums and Misleading Representations: Regulates false or misleadingly superior representations; inaccurate ingredient content claims are subject to this law.
• Food Labeling Act and its implementing Food Labeling Standards: Uniformly regulate the mandatory elements of all food labels, including product name, ingredients, net content, expiration date, storage method, and manufacturer information.

The Foods with Function Claims system, established in 2015, permits companies to make limited functional statements after filing scientific evidence with the Consumer Affairs Agency. However, the application of this system to NMN remains subject to strict scrutiny. The vast majority of NMN products on the market circulate as general foods and may not display any functional statements on the principal display panel.

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II. Ingredient Content Labeling Standards: Core Disclosure Dimensions for NMN

2.1 Mandatory Disclosure of Per-Serving and Daily Intake

Japan's current Food Labeling Standards require that dietary supplements clearly indicate on the label the ingredient content corresponding to each serving (per capsule, per sachet, etc.) and the recommended daily intake, enabling consumers to calculate their actual intake.

For NMN products, a compliant label should clearly present:

• The actual NMN content per unit (per capsule/sachet/bag), expressed in milligrams (mg)
• The recommended daily intake (number of capsules or grams)
• The resulting daily NMN intake calculated therefrom

Common non-compliance patterns: Some products use phrases such as "high content" on the principal display panel while relegating specific figures to the ingredient list on the reverse side in extremely small print, or deliberately obscuring the individual NMN content by presenting it as part of a "proprietary blend." The Consumer Affairs Agency has clarified in multiple guidance documents that such practices may constitute a "misleadingly superior representation" within the meaning of the Act against Unjustifiable Premiums and Misleading Representations.

2.2 Traceable Disclosure of Purity and Raw Material Origin

NMN raw material manufacturing employs two processes: fermentation and chemical synthesis. Materials from different sources may differ in purity and impurity profiles. While Japan does not mandatorily require disclosure of the raw material manufacturing method, some higher-transparency companies voluntarily publish supplier qualifications, third-party purity test reports (Certificates of Analysis, CoA), and batch testing data on product inserts or official websites.

When purchasing, consumers may look for the following verifiable information:

• Whether raw material supplier or origin information is disclosed
• Whether a Certificate of Analysis issued by a third-party testing organization (such as the Japan Food Research Laboratories, SGS, Eurofins, etc.) is provided
• Whether the NMN purity value is clearly stated (industry convention generally requires ≥98%)

2.3 Labeling Requirements for Other Nutritional Ingredients

Where a product is formulated with other active ingredients such as vitamins, minerals, or Coenzyme Q10, the Food Labeling Standards require that the content of every major ingredient be individually listed. For "combination formula" products, listing only a total weight without breaking down individual ingredient amounts constitutes incomplete labeling.

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III. Key Product Label Compliance Requirements

3.1 Boundaries of Prohibited Statements

This is the most critical compliance issue in NMN product labeling. Under Japan's Health Promotion Act and Act against Unjustifiable Premiums and Misleading Representations, NMN products sold as general foods may not, on any packaging, insert, advertisement, or official website, include any disease name, claim of disease prevention or treatment, or claim of restoration of bodily organ function.

Specifically, the following types of statements are non-compliant on labels and promotional materials:

• Improvement, prevention, or adjunctive treatment of specific diseases
• Statements implying repair or regeneration effects on cells, DNA, or organs
• Functional language beyond "anti-aging" that has not been registered under the Foods with Function Claims system

Since 2021, the Consumer Affairs Agency has conducted multiple rounds of targeted inspections of the dietary supplement industry and has issued administrative guidance or required public explanations from several companies that posted non-compliant claims on social media and e-commerce platforms.

3.2 Mandatory Label Elements

Pursuant to the Food Labeling Act, NMN product labels sold domestically in Japan must include at minimum:

For imported products placed on the market, -language labeling must also be affixed, and the importer must appear as the responsible labeling entity.

3.3 Label Presentation of GMP Certification and Manufacturing Facility Qualifications

The Japan Health and Nutrition Food Association (JHNFA) has established a GMP Compliance Certification (GMP) system for dietary supplement manufacturers. Facilities applying for certification are evaluated on raw material management, production process controls, finished product testing, and documentation, and are issued a certification number upon approval.

This certification is not a statutory requirement, but is a widely recognized voluntary quality assurance system within the industry. For manufacturing facilities holding JHNFA GMP Compliance Certification, the certification number can be cross-verified against JHNFA's publicly accessible database. For example, a facility holding certification number 34225 can be queried in the association's published registry to confirm its certification status and validity period. Where a product label references such certification, consumers should proactively verify the authenticity of the certification number rather than relying solely on the label claim.

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IV. Key Cross-Border Purchasing Compliance Considerations

4.1 Japan → Mainland China: Regulations on Personal Carriage and Mailing

Personal carriage upon entry: Under China's current customs regulations, travelers carrying a reasonable quantity of foreign health food products for personal use are generally subject to postal and parcel tax policies. In practice, NMN products manufactured in Japan as dietary supplements may be classified by Chinese customs as either "health foods" or "foods," and the applicable tax rate and customs processing may differ accordingly. Quantities that clearly exceed what is reasonable for personal use may be subject to taxation or seizure.

Mailing / courier shipment: The import by individuals of foreign health food products not registered in China through international mail or courier channels presents compliance risks at the regulatory level. China's Administrative Measures for the Registration and Filing of Health Foods require that products imported under the designation of health foods obtain a registration approval number (the "Blue Hat" certification) issued by the State Administration for Market Regulation. Importation on a commercial scale without registration constitutes a violation.

The majority of NMN products currently on the market have not obtained Chinese health food registration approval. The compliance basis for cross-border e-commerce channels is typically China's cross-border e-commerce import policy (personal imports) rather than general trade imports. The regulatory requirements under these two pathways differ materially, and consumers must pay attention to the compliance status of their chosen purchasing channel.

4.2 Japan → Mainland China: Compliant Cross-Border E-Commerce Channels

Under the retail import policy for cross-border e-commerce, consumers purchasing foreign products through registered cross-border e-commerce platforms are subject to a policy framework for "personally imported goods for personal use," which requires:

• A single order value not exceeding RMB 5,000, with an annual cumulative limit not exceeding RMB 26,000 (subject to current policy; refer to the most recent regulations for any adjustments)
• Products must not contain ingredients explicitly prohibited for import into China
• Transactions must be conducted through cross-border e-commerce platforms and bonded warehouse channels registered with customs

Even when purchased through compliant cross-border e-commerce channels, NMN products remain subject to management as foods rather than health foods in China, and their domestic promotion must not violate China's Advertising Law or regulations governing health foods.

4.3 Basic Compliance Logic for Other Destination Markets

• United States: The FDA discussed the dietary supplement status of NMN between 2022 and 2023, and its compliant classification remains subject to dynamic change. Refer to the FDA's most current guidance documents.
• European Union: Regulatory treatment of dietary supplements varies among member states; some countries impose higher pre-market compliance requirements for NMN than Japan. Confirm the specific requirements of the target market before procurement.
• Hong Kong SAR: Hong Kong does not require pre-market registration for general health supplements, but similarly does not permit disease-related claims on labels or in advertising.

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V. Actionable Guidance for Consumers

Based on the compliance logic outlined above, consumers purchasing cross-border NMN products may conduct an independent, verifiable self-assessment by following these steps:

• 1. Verify completeness of ingredient content labeling: Confirm that the label clearly states the NMN content per serving (in mg) and the total daily intake as specific numerical figures, rather than merely qualitative language such as "high content" or "ultra-pure formula."
• 2. Identify non-compliant efficacy claims: If any product label, advertisement, or sales description contains a disease name, therapeutic claim, or a promise of a specific physiological repair effect, treat this as a warning sign. Such statements are non-compliant in Japan and also violate advertising regulations in China.
• 3. Verify manufacturing facility qualifications: If a product indicates JHNFA GMP Compliance Certification, log on to the JHNFA official website (jhnfa.org) and access the certified facility registry page to enter the certification number and verify its authenticity and validity. Certification numbers are unique identifiers and permit precise verification.
• 4. Review third-party test reports: Prioritize brands that publicly disclose batch test reports (CoA); verify whether the measured NMN content is consistent with the labeled value and review the test conclusions for safety indicators such as heavy metals and microbiological counts.
• 5. Confirm compliance of the purchasing channel: When purchasing through cross-border e-commerce platforms, confirm whether the platform holds a China Customs cross-border e-commerce registration; avoid large-volume purchasing through informal daigou (personal shopping agent) channels to mitigate the risks of customs seizure and quality traceability issues.
• 6. Retain proof of purchase and product information: Keep purchase records, product lot numbers, and production dates to facilitate traceability and complaint filing in the event of a product issue.

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Conclusion

The labeling compliance challenges surrounding NMN products are, at their core, a matter of information transparency. Japan's existing regulatory framework — encompassing the Food Labeling Act, the Act against Unjustifiable Premiums and Misleading Representations, and other statutes — requires companies to base consumer decision-making on verifiable data rather than subjective efficacy claims. Precise labeling of ingredient content, verifiability of manufacturing facility qualifications, and public disclosure of third-party testing data are the defining dimensions that distinguish high-transparency products from those of inferior quality.

For cross-border consumers, understanding the regulatory differences between the destination market and the source market, selecting products with complete compliance information disclosure, and procuring through compliant channels are the fundamental means of reducing quality and legal risk. Regulatory policy is subject to ongoing change; consumers are advised to consult the latest guidance documents issued by the relevant market regulatory authorities before making purchasing decisions.

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*The content of this paper is compiled from publicly available regulatory documents and industry standard information. It does not constitute legal advice or medical advice. Dietary nutritional supplements are not a substitute for a balanced diet, are not pharmaceuticals, and do not possess the function of diagnosing, treating, or preventing any disease.*