Hyaluronic Acid · Consumer Purchasing Guide

Abstract

Hyaluronic acid (chemical name: hyaluronic acid) has expanded from the medical aesthetics sector into the oral dietary supplement market, with global annual sales continuing to grow. Japan, as a market with a relatively well-developed product development and quality control framework, has established a comparatively mature system of labeling and certification. Nevertheless, consumers are often unable to distinguish "verifiable facts" from "marketing language" when faced with an overwhelming variety of products. This guide approaches the purchasing decision from verifiable dimensions — including ingredient labeling, molecular weight transparency, raw material traceability, manufacturing certification, and regulatory compliance — and provides a practical purchasing framework to help consumers make more informed decisions without relying on efficacy claims.

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I. Hyaluronic Acid as a Food Ingredient: Foundational Knowledge

Hyaluronic acid is a high-molecular-weight polysaccharide that occurs naturally in the body's connective tissues, the dermal layer of the skin, and synovial fluid in joints. As a food ingredient, its history of use in Japan dates back to the early 2000s, when it first entered the functional food market primarily in the form of sodium hyaluronate.

There are several fundamental facts consumers should understand regarding the nature of this ingredient:

The distinction between endogenous and exogenous hyaluronic acid: Hyaluronic acid in the body is synthesized by the body's own cells; orally ingested hyaluronic acid is an exogenous polysaccharide. Japan's Consumer Affairs Agency has, under the framework of the Foods with Function Claims system, permitted certain hyaluronic acid products to submit scientific evidence for notification. However, the boundary between the notified content and the actual functional claims made is a compliance risk area that consumers should pay close attention to.

Classification by raw material source: Commercial hyaluronic acid raw materials are primarily divided into two categories:

• Animal extraction method: Traditionally derived from rooster combs, this method is lower in cost but involves batch-to-batch consistency variability and requirements for allergen labeling of animal-derived materials.
• Microbial fermentation method: Obtained through fermentation using strains such as *Streptococcus zooepidemicus*; this method yields higher purity and represents the mainstream raw material form in the current market, as it is also more amenable to batch-level traceability.

Neither source is inherently superior or inferior; the critical factor is whether the product label accurately discloses the source. Products with vague or undisclosed origin information represent the first warning sign of insufficient information transparency.

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II. Japan's Regulatory Framework: Institutional Coordinates Consumers Should Understand

Regulation of oral hyaluronic acid products in Japan spans multiple legal tiers. Understanding this framework helps consumers correctly interpret product labeling.

2.1 The Legal Boundary Between Food and Pharmaceutical Products

Under Japan's Act on Securing Quality, Efficacy and Safety of Products Including Pharmaceuticals and Medical Devices, oral dietary supplements may not claim to "prevent, treat, or alleviate diseases." Any product promoted using language such as "improves joint disease" or "treats skin conditions" is in violation of the law. If consumers encounter such statements on a product page or packaging, they should treat this as a major compliance red flag and exercise caution regardless of price.

2.2 The Foods with Function Claims System

Established by Japan's Consumer Affairs Agency in 2015, this system allows businesses to display specific functional claims on food packaging (e.g., "This product contains hyaluronic acid and supports…") after submitting scientific evidence to the Consumer Affairs Agency and completing the notification process.

Consumers can verify this through the following means:

• Access the Consumer Affairs Agency's official Foods with Function Claims notification database, and search by product name or company name to review the notification content and summary of scientific evidence.
• Verify the "notification number" on the packaging — typically formatted as a letter-number combination (e.g., "F○○○") — and cross-reference it against the database records.

Products that have not been notified may not display functional claims. If a product uses functional-claim language but carries no notification number, this constitutes a clear labeling violation.

2.3 Foods for Specified Health Uses (FOSHU / Tokuho)

Foods for Specified Health Uses require individual approval from the Consumer Affairs Agency through a rigorous and lengthy review process. The number of products centered on hyaluronic acid as the core ingredient that have received Tokuho certification currently remains limited. If consumers encounter a product claiming to be a "Food for Specified Health Use," they should verify whether the packaging bears the Consumer Affairs Agency's designated certification mark (the gourd-shaped logo), and whether the product can be found in the Consumer Affairs Agency's official Tokuho database.

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III. Molecular Weight Variation and Labeling Transparency

The molecular weight of hyaluronic acid has significant implications for its behavior within the food system and is a key dimension by which consumers can assess the transparency of product information.

Commercially available hyaluronic acid raw materials are broadly categorized into three classes by molecular weight:

• High-molecular-weight hyaluronic acid: Molecular weight typically above 1,000,000 Da (1 MDa); the primary output form of conventional fermentation processes.
• Low-molecular-weight hyaluronic acid: Produced by enzymatic hydrolysis or physical degradation of high-molecular-weight hyaluronic acid, reducing it to the range of thousands to tens of thousands of Da.
• Ultra-low-molecular-weight (oligomeric) hyaluronic acid: Molecular weight in the range of hundreds to thousands of Da; attracting increasing research interest, although market product labeling in this category tends to be inconsistent.

The key question for consumers is whether the product clearly discloses the molecular weight range or specification of the hyaluronic acid used. Some companies emphasize concepts such as "low molecular weight" or "nano-grade" in their marketing, yet provide no verifiable molecular weight data on the packaging or product specification sheet — a typical example of insufficient information transparency.

Products with high information transparency will generally provide the following through their product information insert or on the company's official website:

• The name of the raw material supplier or the trade name of the raw material (e.g., "HA-F Hyaluronic Acid");
• The molecular weight range (e.g., "average molecular weight approximately 2,000,000 Da");
• The hyaluronic acid content per daily serving (mg/day);
• The ratio of other ingredients to hyaluronic acid.

If none of the above information is obtainable through publicly available channels, consumers are advised to contact the company directly and use the quality of the company's response as one measure of its information transparency.

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IV. Raw Material Origin and Supply Chain Traceability

Hyaluronic acid raw materials sold in the market primarily come from two sources: domestic manufacturers and imported raw materials from China. This fact in itself does not constitute a quality judgment; the critical issue is whether the product company has established a traceable raw material management system.

4.1 Labeling Conventions for Domestically Produced Raw Materials

Some manufacturers use ingredients from well-known domestic raw material suppliers and note the raw material origin in their product communications (e.g., " / Hyaluronic acid manufactured domestically"). Companies that can provide raw material batch numbers or supplier qualification certificates offer a higher level of traceability.

4.2 Compliance Management Requirements for Imported Raw Materials

Under Japan's Food Sanitation Act, imported food ingredients must undergo review by the Ministry of Health, Labour and Welfare, with importers bearing the obligation to file quarantine declarations. Consumers can evaluate products from the following angles:

• Does the product company publicly disclose the country of origin of its raw materials on its official website?
• Does the company hold third-party heavy metal testing or pesticide residue testing reports (applicable to raw materials derived from plant-based fermentation substrates)?
• Has the company obtained certification under food safety management systems such as ISO 22000 or FSSC 22000?

4.3 Common Vague Statements in Raw Material Labeling

The following types of statements are frequently encountered in the market, and consumers should be able to recognize them for what they are:

• "" (strictly selected ingredients): No specific selection criteria are provided; this is a hollow claim.
• "" (plant-derived): There is no commercially viable plant-derived production pathway for hyaluronic acid itself; when this description is applied to hyaluronic acid, it is potentially misleading.
• "" (natural ingredients): The specific origin and processing method of each ingredient must be confirmed; "natural" does not equate to "unprocessed" or "pure."

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V. Manufacturing Certification Systems: Identifying and Verifying GMP

Good Manufacturing Practice (GMP) certification is one of the core dimensions for evaluating the quality management standards of dietary supplement manufacturing, and is the most directly verifiable third-party certification indicator currently available to consumers.

5.1 GMP Certification Systems Applicable in Japan

In Japan, GMP certifications applicable to health foods (including dietary supplements) primarily include:

• JHNFA GMP Compliance Certification (JHNFA GMP): Administered by the Japan Health and Nutrition Food Association (JHNFA) pursuant to industry self-regulatory standards, this is one of the most widely recognized GMP certifications in Japan's health food industry. Certified factories are subject to periodic audits, and certification numbers can be verified in JHNFA's publicly accessible database on its official website.
• Ministry of Agriculture, Forestry and Fisheries GAP certification (applicable to the raw material supply end).
• ISO 22716 (Cosmetics GMP; referenced by some topical products).

When purchasing oral hyaluronic acid products, consumers should prioritize verifying whether the manufacturing facility holds JHNFA GMP Compliance Certification, and independently verify the certification number's validity and status through the JHNFA official website database, rather than relying solely on the marking on the product packaging.

5.2 Steps for Verifying GMP Certification

• 1. Locate the GMP certification information and certification number claimed on the product packaging or the company's official website.
• 2. Access the JHNFA official website and navigate to the "GMP (List of GMP-Certified Factories)" page.
• 3. Search by certification number or factory name to confirm that the record matches the product's claims.
• 4. Verify that the certification expiry date is still valid at the time of purchase.

If a product claims to hold GMP certification but the provided certification number cannot be found as a corresponding record in the official database, this constitutes a critical failure of information verification, and consumers are advised to reject the product.

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VI. Identifying Exaggerated Claims: Seven Common Red Flag Signals

The following are seven typical patterns of exaggerated promotion that consumers should be alert to when purchasing hyaluronic acid products in the market and through Chinese-language e-commerce channels:

Red Flag 1: Direct or indirect disease/treatment claims

Use of language such as "improves arthritis," "reduces joint pain," or "effective for skin conditions" — regardless of how euphemistically it is phrased (e.g., "said to help with…," "experts believe…") — constitutes non-compliant promotion if it implies any association with a disease.

Red Flag 2: Unsubstantiated "clinically verified" claims

Claims of "clinically tested and validated" without providing verifiable specifics such as the name of the study, the research institution, the number of participants, and the journal of publication. Consumers can attempt to search for relevant literature on PubMed or J-STAGE (Japan's academic literature database); any "clinical validation" that cannot be retrieved carries no evidentiary value.

Red Flag 3: Absence of ingredient quantity information

The product packaging does not state the specific hyaluronic acid content per recommended daily serving (in mg), listing only "contains hyaluronic acid " or similar language, making it impossible to evaluate whether the intake amount is meaningful.

Red Flag 4: Conflation of oral and topical mechanisms of action

Some products' promotional materials directly apply the skin-moisturizing mechanism of topical hyaluronic acid to the oral context, implying that the effects of oral ingestion are equivalent to those of topical application — a misleading conflation of two fundamentally different product modalities.

Red Flag 5: Non-transparent "proprietary formulas"

Claims of "proprietary patented ingredients" or "secret formulas" while refusing to disclose the specific names, quantities, and origins of ingredients, making any independent verification impossible.

Red Flag 6: Unsubstantiated absorption rate claims

Claims that the product offers "X times greater absorption than ordinary products" without being able to provide supporting literature. The oral absorption mechanisms of hyaluronic acid remain an active area of scientific research; any absolutist "absorption rate" figure should be accompanied by a specific study reference.

Red Flag 7: Fictitious or unverifiable certification marks

Certification marks appearing on packaging that consumers are unfamiliar with, accompanied by no information on the issuing body, certification number, or verification pathway. Some privately created certification marks bear a visual resemblance to official certification marks; consumers should be wary of any certification that cannot be independently verified.

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VII. The Relationship Between Price and Quality: Dispelling Two Common Misconceptions

Misconception 1: Higher price means better quality

The retail price of dietary supplements is influenced by distribution costs, marketing expenditure, packaging design, and brand premium, and does not correlate linearly with raw material quality or manufacturing standards. High-priced products do not necessarily hold verifiable quality certifications, nor do lower-priced products necessarily have quality issues. Purchasing decisions should return to verifiable dimensions rather than price alone.

Misconception 2: Imported products are more trustworthy than domestically produced ones

Products manufactured within Japan must comply with Japan's Food Sanitation Act and applicable labeling regulations, and are subject to dual oversight by the Consumer Affairs Agency and the Ministry of Health, Labour and Welfare. "Imported brands" circulating through certain distribution channels may lack the scrutiny of Japan's domestic regulatory framework, and their labeling information may be incomplete. Consumers should focus on whether the product meets the regulatory requirements of the jurisdiction in which it is sold, rather than judging credibility solely on the basis of place of origin.

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VIII. Actionable Steps for Consumers

The following are the core recommendations of this guide, which consumers can check off when making actual purchasing decisions:

Labeling Verification (to be completed before purchase)

• [] Does the product packaging state the daily hyaluronic acid intake (mg/day)?
• [] Does it disclose the type of raw material source (fermentation method / animal extraction) and country of origin?
• [] If claimed to be a Food with Function Claims, can the notification number be verified in the Consumer Affairs Agency database?
• [] If claimed to be a Food for Specified Health Use (Tokuho), is there a Consumer Affairs Agency certification mark and a corresponding database record?

Manufacturing Certification Verification (to be completed before purchase)

• [] Does the product provide a GMP certification number?
• [] Has the validity of that number been confirmed on the JHNFA official website or the official website of another certifying body?
• [] Does the certification's validity period cover the current date?

Promotional Content Review (to be completed before purchase)

• [] Does the product page contain any disease names or efficacy claims?
• [] Can the claimed "clinical validation" be found as a specific publication in publicly accessible academic databases?
• [] Are there any unverifiable certification marks in any promotional images or copy?

Post-Purchase Record-Keeping Recommendations

• Retain the purchase receipt, batch number, and original product packaging for at least three months.
• In the event of a quality issue, reports may be filed with the Consumer Affairs Agency Consumer Hotline in Japan (telephone: 188) or with the local public health center.
• Third-party testing reports may be requested through the company's official website or customer service channels as a means of assessing the company's willingness to disclose information.

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IX. Summary of the Purchasing Framework

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Closing Remarks

In the dietary supplement market, information asymmetry is the fundamental challenge facing consumers. Hyaluronic acid products, because they relate to areas of high consumer interest such as skin and joint health, have become one of the sectors most susceptible to exaggerated claims. Nevertheless, the maturation of the regulatory framework — particularly the public accessibility of Japan's Foods with Function Claims system and GMP certification database — has equipped consumers with verification tools they can independently employ.

The central position of this guide is: verifiable facts take precedence over any promotional language. A product that clearly labels its ingredient content, allows traceability of its raw material origin, holds certifications that can be independently verified, and makes no efficacy claims is more trustworthy — at the level of information — than a product claiming "a hundred benefits" about which no information can be checked.

Every rational choice consumers make also contributes to driving the entire industry toward greater information transparency.

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*This document was prepared based on publicly released regulations, institutional frameworks, and certification information from Japan's Consumer Affairs Agency, the Ministry of Health, Labour and Welfare, and the Japan Health and Nutrition Food Association. It does not constitute medical advice, nor does it make any claims or guarantees regarding the efficacy of any specific product. Oral dietary supplements cannot replace pharmaceutical treatment. For any health concerns, please consult a registered healthcare professional.*