Deep-Sea Fish Oil (EPA/DHA) · Labeling Standards and Cross-Border Compliance

Abstract

Deep-sea fish oil is one of the best-selling categories of dietary nutritional supplements worldwide. The accuracy of labeling for its core ingredients EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), label compliance, and cross-border distribution standards have become central dimensions of consumer purchasing decisions and regulatory scrutiny. This paper systematically reviews the major regulatory frameworks and industry standards in Japan, the United States, the European Union, and China from three perspectives—ingredient quantity labeling standards, label compliance requirements, and cross-border purchasing considerations—and distills actionable consumer verification pathways. No medical or efficacy claims are made herein.

---

I. EPA/DHA Content Labeling: An Overview of the International Standards Landscape

1.1 The GOED Voluntary Monograph: The Industry Baseline

The *GOED Omega-3 Monograph*, published by the Global Organization for EPA and DHA Omega-3s (GOED), is the most widely cited industry self-regulatory standard in existence. It requires:

• Tolerance between labeled and measured quantities: The total measured EPA+DHA content in finished products must not fall below -10% of the label claim—positive deviations are permitted, but negative deviations must be kept within 10%.
• Oxidation indicator limits: Peroxide value (PV) ≤ 5 meq/kg, anisidine value (AV) ≤ 20, and TOTOX (total oxidation value, calculated as 2×PV + AV) ≤ 26. These three indicators are the key verifiable parameters for assessing fish oil freshness and stability; they are closely associated with product degradation but do not constitute efficacy claims.
• Heavy metal limits: Lead ≤ 0.1 mg/kg, mercury ≤ 0.1 mg/kg, inorganic arsenic ≤ 0.1 mg/kg, cadmium ≤ 0.1 mg/kg.

The GOED standard is voluntary in legal terms, but in commercial practice it has been adopted by numerous international buyers and certification bodies as a baseline for market entry.

1.2 IFOS Certification: A Third-Party Verification System

The International Fish Oil Standards (IFOS) program, operated by Nutrasource in Canada, conducts independent testing of each production lot of fish oil products and publishes the results publicly. The five-star rating system requires products to simultaneously satisfy:

• Measured EPA/DHA content ≥ labeled quantity;
• Oxidation indicators, heavy metals, dioxins, and polychlorinated biphenyls (PCBs) meeting or exceeding GOED/WHO limits;
• Lot-specific reports queryable via the official website, with lot-level traceability.

IFOS certification lot reports are transparency tools directly accessible to consumers and represent a third-party verification pathway independent of brand-level claims.

1.3 Codex Alimentarius: The International Food Standard for Fish Oils

The *CODEX STAN 329-2017* (Fish Oils Standard), published by the Codex Alimentarius Commission of the Food and Agriculture Organization of the United Nations and the World Health Organization, specifies physicochemical parameters for fish oils intended for human consumption, including fatty acid composition ranges, iodine value, refractive index, saponification value, and other fundamental quality parameters. This standard serves as an important reference for individual countries in formulating their domestic regulations and as a technical background document for customs compliance.

---

II. Labeling Standards: A Multi-Layered Regulatory Framework

2.1 Coordinated Constraints Under the Food Labeling Act and the Health Promotion Act

Japan's label management of health foods is governed at the primary level by the Food Labeling Act (2015), with the Health Promotion Act providing supplementary constraints on advertising language. For fish oil products specifically, the following labeling elements are legally mandatory:

• Name: Must state "fish oil" (*gyoyu*) or the specific source species (e.g., sardine oil, mackerel oil);
• Ingredient names: Must be listed in descending order of weight used; additives must be listed separately from main ingredients;
• Net content: Softgel products must state both the number of capsules and the net weight (in g or mL);
• Best-before date and storage instructions: Fish oil is sensitive to temperature and light, and storage condition labeling directly affects oxidative stability;
• Manufacturer/distributor address and contact information;
• Allergen labeling: Fish is one of the 28 allergens specified under regulations, and the source fish species must be clearly stated.

Under the general food framework, there is no mandatory obligation to disclose EPA/DHA daily intake or per-capsule content; however, once such information is included on the label, it falls under the prohibition on false labeling, and measured deviations must remain within a reasonable range.

2.2 The Foods with Function Claims System: Strict Requirements for Ingredient Quantity Labeling

If a company chooses to use functional-related language on packaging that references EPA/DHA—such as specific wording pertaining to *chūsei shibō* (neutral fats/triglycerides)—it must file a notification with the Consumer Affairs Agency (CAA) under the Foods with Function Claims (Kinōsei Hyōji Shokuhin) system, clearly specifying in the notification document:

• The precise content (in mg) of EPA and DHA per daily serving;
• Systematic review (SR) literature evidence supporting the claim;
• Ingredient content verification test data for production lots;
• A written description of the periodic self-inspection system.

The CAA database publicly discloses notification information for all accepted products. Consumers can access the original notification documents on the official website by entering the product notification number, making this the most operationally practical transparency verification tool available in the market.

2.3 JHNFA GMP Certification: A Verifiable Dimension of Manufacturing Quality

The GMP Compliance Certification (*GMP Tekigō Nintei*) issued by the Japan Health and Nutrition Food Association (JHNFA) is a third-party assessment of the manufacturing quality management system at health food facilities, covering the full workflow including incoming raw material inspection, manufacturing process control, quality inspection, and deviation management. This certification number must be applied for by the facility directly with the Association and is subject to on-site audit; certification results are publicly queryable on the JHNFA official website.

To cite a specific verifiable example: a product manufactured at a facility holding JHNFA GMP Compliance Certification (Certification Number 34225) has had its manufacturing management system formally assessed through the Association's official evaluation procedure. The queryability of the certification number itself constitutes an independent indicator of information transparency.

It should be noted that GMP certification evaluates a facility's management system; it does not endorse the ingredient content or efficacy of any individual product. The two operate at distinct levels in regulatory terms.

---

III. United States Labeling Standards: Supplement Facts Under the DSHEA Framework

3.1 Core Requirements of the Dietary Supplement Health and Education Act (DSHEA)

The United States classifies fish oil as a dietary supplement, regulated under the 1994 DSHEA, with FDA 21 CFR Part 101 and Part 111 specifying detailed labeling and manufacturing requirements:

• Supplement Facts label: Must list the content (in mg) of EPA and DHA per serving size, stated separately rather than combined;
• Percent Daily Value (%DV): No official Daily Reference Intake (DRI) has been established for EPA and DHA, so these are typically indicated with an asterisk ("*") accompanied by the footnote "Daily Value not established";
• Manufacturers must maintain product purity, potency, composition, and identity in compliance with label claims (21 CFR 111); the FDA is empowered to issue recall warnings for products that do not meet label-stated quantities;
• Disease claims are prohibited on labels: Language on fish oil packaging that references names of diseases or medical terminology relating to the heart, cardiovascular system, or other conditions must either be pre-submitted to the FDA via notification or fully comply with Structure/Function Claim requirements, and must be accompanied by the disclaimer: "This statement has not been evaluated by the FDA."

The FDA's publicly available Dietary Supplement Ingredient Advisory List and recall database are public information sources for verifying whether specific brands have records of label violations.

3.2 NSF International and USP Certifications

The NSF International "NSF Contents Certified" mark requires products to pass independent laboratory testing confirming that labeled ingredients match measured ingredients and that contaminant limits are met. The United States Pharmacopeia (USP) Verified Mark similarly applies verifiable standards for ingredient content accuracy, contaminants, and disintegration. Both certification marks are voluntary; however, their certification databases are publicly queryable and represent one of the consumer verification pathways available.

---

IV. European Union Labeling Standards: Separation of Nutrition Claims and Health Claims

4.1 Regulation EC No 1924/2006 on Nutrition and Health Claims

The core constraint on fish oil product labeling in the EU lies in the distinction between two categories of claims:

• Nutrition Claims: For example, "high in Omega-3 fatty acids." These must meet the specific conditions set out in Annex I of EC No 1924/2006 (e.g., a product containing ≥ 0.3 g EPA+DHA per 100 g may use the claim "source of Omega-3 fatty acids");
• Health Claims: These must appear on the EU's positive list of authorized health claims (Regulation EU No 432/2012). Among fish oil ingredients, only a limited number of specific claims—such as DHA and EPA contributing to normal cardiac function (250 mg EPA+DHA per day)—have been approved following scientific evaluation by the European Food Safety Authority (EFSA). All other non-approved claims are prohibited without exception.

This regulatory design, whereby claims must be substantiated by scientific evidence and require official approval, makes the EU the most stringent jurisdiction at the compliance level with respect to ingredient quantity labeling accuracy: once an approved health claim is invoked, the product must be able to demonstrate that its content consistently meets the quantitative standard associated with that claim.

4.2 Novel Food Regulations and Refined Fish Oil Sources

Certain DHA/EPA derived from microalgae—such as algal oil sourced from *Schizochytrium* sp.—must obtain authorization through the Novel Food procedure in the EU (EC No 2015/2283). Their labels must state the approved source and conditions of use. When purchasing algae-derived Omega-3 products, consumers should verify the product's authorization status in the EU Novel Food Catalogue.

---

V. Key Compliance Considerations for Cross-Border Purchasing

5.1 China Import Compliance: The Dual-Track System of Health Foods and Ordinary Foods

Under China's Administrative Measures for Registration and Filing of Health Foods (2016) and the Food Safety Law, imported health foods must obtain a Blue Hat registration certificate or filing acknowledgment issued by the State Administration for Market Regulation (SAMR) before they may be sold within China as health foods. Fish oil products sold in the Chinese market as health foods:

• Must bear the "Blue Hat" symbol and approval document number on the packaging;
• The EPA/DHA functional ingredients must be consistent with the content approved in the registration certificate;
• Products from overseas sold through purchasing agents or cross-border e-commerce channels are treated under Chinese law as personal-use imports and are not considered domestic health food sales; however, if redistributed domestically, full compliance and registration are required.

Personal cross-border purchases of fish oil products brought into China, provided the quantity does not exceed a reasonable personal-use amount (generally as specified by Customs regulations), are typically handled as personal-use goods; commercial distribution must follow the import compliance pathway for health foods.

5.2 Dual Verification of Label Language and Ingredients

When purchasing or Western fish oil products cross-border, the following should be noted:

• Label language: Products with -language labels entering the Chinese market are required to carry Chinese-language labels for compliant commercial sale. For personal-use purchases, consumers are advised to check the original label for EPA/DHA content (the abbreviations "EPA" and "DHA" appear as alphabetic acronyms on both and English labels and are easy to identify);
• Consistency of ingredient quantity units: labels frequently express quantities per capsule (*1-tsubu atari*), while American labels use per serving (*Per Serving*). Consumers should confirm whether they are calculating content per capsule or per recommended daily dose to avoid overestimating intake due to unit conversion errors;
• Lot traceability verification: For products with IFOS certification, consumers can enter the lot number printed on the packaging into the IFOS official website to retrieve the corresponding third-party test report and verify whether the measured EPA/DHA content for that lot aligns with the label claim.

5.3 Oxidation Status and Shipping Conditions

The oxidative progression of fish oil is significantly influenced by heat, light, and oxygen. Cross-border shipping periods can be lengthy; upon receipt, consumers may conduct a preliminary assessment through the following observable indicators:

• Odor: The contents of high-quality fish oil capsules should have a mild odor. A pronounced rancid smell (sharp, fishy, irritating) is a sensory signal of peroxidation;
• Appearance: Liquid fish oil or softgel contents should be a pale to golden yellow. Deepening of color may indicate oxidation or inadequate raw material refinement;
• Expiry date check: Consumers should confirm that there is sufficient time remaining before expiry upon receipt, and should verify that the product was not exposed to high temperatures throughout transit.

5.4 Information Transparency on Fish Species and Sustainability Certifications

Verifiable dimensions of raw material source information that consumers may check include:

• MSC (Marine Stewardship Council) Certification: Certified fisheries operate under sustainable fishing management. The MSC's Chain of Custody database on the official website can be searched to verify whether a specific company holds a valid certification;
• Friend of the Sea Certification: Another third-party certification addressing the sustainability of aquatic product sourcing, with a similarly public database;
• Species disclosure: Some high-transparency brands disclose the source fish species and fishing area on their labels or websites; this is an important indicator of raw material traceability.

---

VI. Consumer Action Checklist

• 1. Read the Supplement Facts / Nutritional Information panel: Confirm that EPA and DHA are each listed separately with specific milligram figures, rather than only "fish oil XXXX mg" (the latter does not indicate actual Omega-3 content).
• 2. Calculate actual daily intake: Multiply per-capsule content by the recommended daily number of capsules, then compare with the label's "recommended daily dose" to confirm that the calculation basis is consistent.
• 3. Look up the IFOS report: Visit the IFOS official website, enter the brand or product name, and check whether public lot test reports and a five-star rating are available. Verify whether the measured EPA/DHA deviation from the label claim is within -10%.
• 4. Search the notification database (Foods with Function Claims): If the product is a Food with Function Claims (*Kinōsei Hyōji Shokuhin*), visit the Consumer Affairs Agency's "Functional Food Notification Information Search" (*Kinōsei Hyōji Shokuhin Todokede Jōhō Kensaku*) and enter the notification number to verify the original ingredient content data.
• 5. Search the JHNFA GMP Certified facility list: If the product claims to be manufactured at a JHNFA GMP Certified facility, visit the JHNFA official website's list of certified facilities and check whether the certification number is registered.
• 6. Check the FDA Recall Database (for U.S. products): Visit the FDA Recall Database and search to determine whether the brand has any recall records related to ingredient discrepancies or contamination.
• 7. Confirm storage conditions stated on the packaging: Prefer products that include specific storage instructions such as "store away from light" or "refrigerate after opening." Pay attention to the expiry date.
• 8. Identify non-compliant claims: If the packaging features disease names or medical claims such as "lowers blood lipids," "treats heart disease," or "prevents Alzheimer's disease," these constitute non-compliant labeling under the regulations of Japan, the United States, the European Union, and China alike, and should be treated as a negative indicator.

---

Conclusion

The labeling standards framework for EPA/DHA fish oil products is relatively well-established in major markets including Japan, the United States, and the European Union; however, significant differences remain across jurisdictions with respect to the precision requirements for ingredient quantity labeling, the permissible scope of health claims, and the mutual recognition of third-party certifications. When purchasing cross-border, the most effective pathway for consumers to move beyond brand-level narratives and return to verifiable facts is to verify the consistency between ingredient quantities and label claims, publicly available test data on oxidation indicators, the GMP certification status of the manufacturing facility, and the queryability of product notifications or registrations.

Under all known regulatory frameworks, dietary nutritional supplements are not drugs. All labeling standards and certification criteria described in this paper pertain to verifiable dimensions of raw material quality, ingredient content, and information transparency, and do not constitute medical advice of any kind. Consumers with health management needs should consult a licensed healthcare professional.