Addressing technical barriers to trade is a key priority for the Association of Southeast Asian Nations (ASEAN) as part of trade facilitation in achieving the single market and production base under the ASEAN Economic Community directive agreed in 2015. The region has been undertaking positive steps toward standard harmonization in ASEAN priority sectors, integrating and bringing about regulatory convergence by taking into account the diversities that exist in the ten ASEAN member states. Health supplements in ASEAN are under the responsibility of the Traditional Medicine and Health Supplement Product Working Group (TMHS PWG). One of the TMHS PWG’s outputs is the ASEAN Agreement on a Regulatory Framework for Health Supplements, which includes various technical requirements for health supplements that participating member states must adopt by adjusting their domestic regulations. The key ingredients of these health supplements are vitamins and minerals. While all ASEAN countries allow the use of vitamins and minerals in health supplements, the amounts allowed for use vary, depending on the nutritional requirements deemed appropriate by each country. Partly in response to these efforts for regional harmonization, there have been important changes to vitamin and mineral limits in certain ASEAN countries that are worth monitoring. Some of these are outlined below. Thailand In January 2024, the Thai Food and Drug Administration (TFDA) updated the Thai Recommended Daily Intake (Thai RDI) guidelines for the Thai population. Subsequently, the TFDA adjusted the vitamin and mineral limits in order to comply with the updated Thai RDI and to follow the ASEAN Agreement on a Regulatory Framework for Health Supplements. The TFDA’s adjustment of vitamin and mineral limits for use in food supplements came in Notification of the Ministry of Public Health (No. 448) B.E. 2566 (2023) Re: Food Supplements (No. 5), which was published in the Government Gazette on January

On July 19, 2024, Thailand’s Ministry of Public Health Notification No. 450 B.E.2567 (2024) came into effect after being published in the Government Gazette the day before. The notification introduces significant updates to the labeling requirements for prepackaged foods. This new regulation consolidates and updates Thailand’s rules for food labeling by repealing and replacing several previous notifications. The notification’s key changes and their implications for food businesses are identified below. 1. Clarified “Best Before” Definition The notification aligns the definition of “best before” with Codex standards. It now refers to the date marking the end of the period during which the food maintains its best quality under stated storage conditions. After this date, food quality may change, and the product cannot be marketed. 2. Updated Labeling Exceptions Certain foods are exempt from labeling requirements, with the latest list including: Foods sold directly to consumers by manufacturers who can provide product information. Unprocessed foods. Some fresh foods not sold directly to consumers. Prepackaged foods produced and sold for immediate consumption in food service settings. However, any of these exempt foods that have received food serial numbers must still have labels that comply with the notification. 3. Expiration Date and Best-Before Date Display The notification provides clearer language for displaying the expiration date and best-before date. If specific wording is required by other notifications, it must be followed. English equivalents are now permitted alongside Thai text. 4. Warning Displays Multiple applicable warnings can now be consolidated and displayed together, provided the complete message is included as specified. 5. Claims about Substances or Ingredients New guidelines have been established for making claims about food additives and ingredients. Claims should be factual, not deceptive, and provably not false. 6. Label Placement and Design Labels must be permanently affixed, proportionate to the packaging, and

Tilleke & Gibbins has contributed the Thailand chapter to the 2024 edition of Pharmaceutical Advertising from the International Comparative Legal Guides (ICLG) series published by Global Legal Group. This detailed guide offers an in-depth examination of pharmaceutical advertising laws and regulations in multiple jurisdictions around the globe. Each chapter of the guide, structured in a Q&A format, is organized into comprehensive sections covering various aspects of pharmaceutical advertising, including: General rules and codes of practice governing pharmaceutical advertising Required arrangements for ensuring compliance with advertising regulations Procedures for obtaining advertising approvals from regulatory authorities Penalties for non-compliance with advertising rules Guidelines for providing information prior to product authorization Requirements for advertisements directed at healthcare professionals Restrictions on the content of pharmaceutical advertisements The complete Thailand chapter is available as a PDF below. The Thailand chapter—and the full Pharmaceutical Advertising guide—are also freely available on the ICLG website.

On July 18. 2024, Vietnam’s Ministry of Health issued Circular No. 12/2024/TT-BYT promulgating National Technical Regulation QCVN 20-1:2024/BYT on the limits of contaminants for health supplements (“Circular 12”). The new national technical regulation is the very first relating to health supplements, and is expected to have a great impact on the control of health supplement quality in Vietnam. Circular 12 will take effect on August 1, 2025. Contents of Circular 12 The new circular prescribes limits of contaminants (heavy metals and microorganisms), testing samples and testing methods, management requirements, and responsibilities of entities manufacturing and trading in health supplements. Supplemented alcohol products which are declared as health supplements are notably excluded from the scope of the regulation. Transitional Provisions Health supplements which (i) have been granted a declaration registration certificate, and (ii) are manufactured before August 1, 2025, are allowed to continue to be imported, traded, and circulated until the expiry date of the product, even if it is not aligned with Circular 12, except when there is food safety warning. Declaration registration dossiers for health supplements submitted before August 1, 2025, will continue to be handled in accordance with the prevailing regulations at the time of submission. From August 1, 2025, if a health supplement with a granted declaration registration certificate has a manufacturer’s standard that does not comply with Circular 12, the party manufacturing/trading in the product must adjust the product standard to conform to Circular 12 and notify the authority of this adjustment.