Rules for Selling Health Functional Foods (Supplements) Online in Korea

Why Selling Supplements Online in Korea Is Different

Health functional foods (건강기능식품) in Korea are regulated under the Act on Health Functional Foods, not the general Food Sanitation Act. This means that even after you register a business, you need a separate sales business notification before you can legally sell a single unit online.

The regulatory body is the Ministry of Food and Drug Safety (MFDS / 식품의약품안전처). However, the actual sales notification is filed with your local district office (시·군·구청), not the MFDS directly — a point that trips up many first-time sellers.

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Step 1: Filing the Health Functional Food Sales Business Notification

Before you sell, you must complete a health functional food hygiene training course (offered by the Korea Health Functional Food Association or designated institutions) and then file the notification with your local district office. Business registration via the National Tax Service (Hometax) is a prerequisite.

Key documents needed:

• Business registration certificate
• Proof of hygiene education completion
• Information about the storage facility for the products

Once approved, you receive a sales business notification certificate — a document that major e-commerce platforms require during vendor onboarding.

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Step 2: OEM Production — What Sellers Must Verify

Even when outsourcing manufacturing, the seller is responsible for ensuring the product meets all legal requirements. The documents you need to hold include:

• Product manufacturing notification certificate issued to the manufacturer
• Certificate of Analysis (COA) for each production batch
• GMP certification of the manufacturing facility
• Confirmation that all functional ingredients are either MFDS-approved notified ingredients or individually recognized ingredients

For ingredient selection, I applied three filters: (1) whether the ingredient is on the MFDS notified ingredient list (allowing functional claims without separate clinical trials), (2) whether the form factor (tablet, capsule, powder, gummy) suits the ingredient's stability, and (3) whether the ingredient supplier provides transparent safety documentation. The NIH Office of Dietary Supplements is a useful reference for reviewing international safety data on specific compounds.

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Step 3: Labeling Standards — The Highest-Risk Area

Korean law mandates specific information on every health functional food label. Missing or incorrect labeling can result in product recalls. Required elements include:

• Product name, net content, ingredient list and amounts
• Functional claims — only exact MFDS-approved wording is permitted
• Serving size and method
• Mandatory disclaimer: 'This product is not a pharmaceutical drug for disease prevention or treatment' (의약품이 아닙니다)
• Expiration date, storage conditions
• Manufacturer and seller information
• Official health functional food mark (식약처 지정 도안)

Any language implying disease prevention, cure, or diagnosis — no matter how indirect — is prohibited and subject to administrative penalties.

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Step 4: Platform Compliance and Barcode Registration

Each major Korean e-commerce platform has its own onboarding requirements for health functional foods. Naver Smart Store requires the sales notification certificate and enforces content review on product detail pages. Coupang may additionally request COA documents. For any offline distribution or Coupang Rocket Delivery, a GS1 Korea barcode registration is required.

For brand protection, checking for existing trademarks via KIPRIS (Korea's patent and trademark information service) before launching is strongly recommended.

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Step 5: Marketing Rules and Monetization

Marketing supplements in Korea requires strict adherence to approved functional claim language. Absolute terms, disease treatment claims, fabricated testimonials, and any implied medical efficacy are all prohibited.

Effective and compliant content strategies include: transparent storytelling about ingredient sourcing and manufacturing standards, educational content about how to read supplement labels, and sharing the rationale behind formulation decisions. This type of content builds consumer trust and drives organic search traffic over time — often more sustainably than paid advertising.

For monetization, a subscription model works well given that consumers understand supplements require consistent intake. Starting with a single SKU to build repurchase rates before expanding the product line helps manage regulatory compliance costs during early stages.