National Cancer Institute/unsplash.com
South Korea’s Ministry of Food and Drug Safety launched a five-day unannounced inspection sweep of personalized supplement retailers on August 24, targeting the hygiene practices, quality management documentation, and labeling compliance of a sector that grew from a seven-company government pilot in 2020 to 776 registered businesses by May 2026. The sweep runs through August 28 and arrives as the ministry is simultaneously pushing the most substantive update to Good Manufacturing Practice standards for the sector since the market was formally established — with a public comment period on those draft rules closing August 31.
That deliberate sequencing — enforcement today, stricter rules by year’s end — marks the moment South Korea’s personalized nutrition retail market exits its prototype phase and becomes a fully regulated industry. It is also the first time any major regulatory body in the world has deployed enforcement machinery against a formalized, at-scale personalized supplement retail sector, because no other jurisdiction has built one.
What Inspectors Are Targeting
MFDS inspection teams are conducting unannounced visits to registered retailers of customized health functional foods — the category covering supplements that licensed pharmacists or registered dietitians divide, combine, and package on-site to meet individual consumers’ needs. Only those two credentialed professional categories may legally make supplement recommendations under the system.
According to the MFDS announcement, inspectors are examining five specific compliance areas: hygiene conditions during the on-site dividing and combining of supplement ingredients; quality management records that must accompany any reprocessing of semi-finished products; labeling compliance, with particular attention to whether individual daily-dose packets carry required information including expiry dates; staff qualifications; and any concurrent use of pharmaceuticals for which point-of-sale precautions must be displayed. The MFDS GMP draft amendments published on August 5 spell out what stricter compliance in each of these areas will look like once the comment period closes.
Inspections include product sampling and laboratory testing, with results to be compared against established standards under the Health Functional Foods Act. Retailers found in violation face administrative sanctions ranging from corrective orders and fines to suspension of business registration, with confirmed suspension cases listed in MFDS public disclosures.
How a Seven-Company Pilot Became a 776-Retailer Industry
The regulatory context behind today’s sweep stretches back to December 3, 2019, when the MFDS published a strategic plan to stimulate the health functional food sector. That plan gave rise to a landmark seven-company personalized supplement pilot announced on April 27, 2020: Pulmuone Health & Living, Amorepacific, Amway Korea, COSMAX NBT, Herbalife Korea, Bigsome, and Mono Labs received special two-year regulatory exemptions to operate stores where consumers could receive customized supplement blends based on questionnaires, dietary assessments, or direct-to-consumer genetic testing.
The rationale was explicitly tied to demographics and consumer behavior. The MFDS described the system as fulfilling demand for daily well-being in the aging society while reflecting consumer trends centered on the user, not the supplier. The regulatory sandbox model — Korea’s established framework for testing innovations under relaxed conditions before formal rulemaking — was the mechanism that made this legally possible.
Six years later, the sandbox has worked almost too well. The seven original participants have been joined by 769 additional businesses, and the overall Korean health functional food market was valued at $4.7 billion in 2023, accounting for 2.6 percent of the global market. South Korea is also one of the world’s largest importers of U.S.-made health supplements — taking in $1.8 billion worth in 2022, representing nearly 38 percent of total Korean supplement imports. Industry projections place the overall Korean market at $20 billion by 2030.
A consumer survey conducted ahead of the system’s full-scale March 2025 launch found that 77.4 percent of respondents indicated willingness to use customized health functional foods — meaning that approximately seven in ten Koreans have expressed intent to use these products.
Why the GMP Gap Matters
The draft amendments the MFDS published on August 5 represent the enforcement complement to today’s inspections — and they reveal exactly what compliance culture has been allowed to develop in the sector’s absence of full GMP requirements.
Under the proposed changes to the Enforcement Rule of the Health Functional Foods Act, all reprocessing procedures must be documented and require sign-off from the head of a quality management department before work begins. Manufacturers will also need to periodically verify that compressed air systems, lubricants, and related equipment do not introduce contamination into products — a direct response to the cross-contamination risks inherent in point-of-sale operations where ingredients are divided and recombined using shared equipment.
The most structurally significant proposed change involves record-keeping for in-house quality testing. Currently, health functional food businesses that conduct testing internally are not required to maintain an anti-falsification record management system — unlike comparable businesses in the food, livestock product, and sanitary product sectors, which already face that requirement. The MFDS explicitly acknowledges this gap: 204 in-house testing manufacturers currently conduct in-house quality testing or partially outsource it. Every one of them faces a new compliance obligation if the draft is adopted.
To ease adoption costs, the MFDS has offered businesses the option to use its own government-operated LIMS system free of charge as an alternative to building proprietary record-keeping infrastructure.
On labeling, the proposed rules would require individual daily-dose packets to carry both an expiry date and a disclaimer that the product is “not a medicine intended for the prevention or treatment of diseases.” The MFDS has acknowledged the practical failure the rule is correcting: consumers routinely carry individual packets after discarding the outer packaging, leaving them unable to confirm the product’s shelf life or, in some cases, to distinguish it from a pharmaceutical.
What Is Personalized Supplement Retail — and Why No Other Market Has Regulated It
To understand why South Korea’s regulatory choices over the next six months matter beyond the Korean domestic market, it is necessary to understand what personalized nutrition regulation actually is — and why virtually every other major jurisdiction lacks it.
Personalized nutrition refers to dietary or supplement recommendations tailored to an individual using their genetics, biomarkers, microbiome data, lifestyle patterns, or dietary assessments, rather than population-level guidelines. The global personalized nutrition market was valued at $16.3 billion in 2025 and is projected to reach approximately $36 billion by 2031. Companies in the United States, European Union, and United Kingdom have built substantial businesses selling personalized supplement subscriptions and genetic-testing-based recommendation services.
And yet, as the UK Food Standards Agency documented in a 2023 review, personalized nutrition services are currently considered as not regulated anywhere in the world. American academics studying the field have echoed the finding: a 2025 workshop paper from the Personalized Nutrition Initiative at the University of Illinois, published in Advances in Nutrition, concluded that there is no regulatory framework specific to personalized nutrition, as it includes products that fall within the FDA’s purview alongside practices that do not. The U.S. launched the NIH Nutrition for Precision Health Program in 2023, but it is a research program, not a commercial regulatory framework.
South Korea is the exception. The MFDS constructed a formal legal category — customized health functional foods — that applies specifically to on-site personalized supplement assembly. It requires professional credentials for the person making recommendations. It imposes point-of-sale hygiene standards. And, beginning today, it applies unannounced enforcement inspections.
The Korean Pharmaceutical Association has not embraced every element of this framework. In May 2025, the KPA publicly objected to the extension of the pilot program, raising concerns about sales of unlicensed products and products sold with opened packaging — categories not permitted under the program’s rules. The concerns suggest that compliance culture within the sector’s 776 retailers is uneven, which is precisely what the MFDS’s inspection sweep will now test.
What Comes Next — and What the World Is Watching
The MFDS has not disclosed how many establishments inspectors will visit during the five-day window or which geographic regions are the primary focus. Laboratory testing results from sampled products will be published after the inspection period concludes, consistent with the agency’s standard disclosure practices.
The more consequential deadline is August 31. That is when the public comment period closes on the draft GMP and labeling amendments — and industry groups, the 204 in-house testing manufacturers, and international market participants with Korean operations have until then to submit their positions. What emerges from that rulemaking will become the world’s first formal GMP standard for point-of-sale personalized supplement assembly.
For U.S. supplement companies — whose products account for nearly 38 percent of South Korean supplement imports — the regulatory direction matters practically: a product distributed through customized supplement retailers in Korea will need to meet whatever standards emerge from this rulemaking cycle, including the new labeling requirements for individual dose packets.
For regulators in the U.S., EU, and UK, who have noted the absence of personalized nutrition regulation in their own markets for over a decade, the Korean experiment now has an enforcement record to study. Whether the MFDS inspection sweep reveals widespread compliance gaps, isolated violations, or a sector broadly meeting existing standards, the data generated will be the first field evidence of what large-scale personalized supplement retail looks like under regulatory scrutiny.
For the 776 Korean retailers whose premises are being visited this week, the message requires no translation: the informal grace period of market formation is over.
Frequently Asked QuestionsWhat is a customized health functional food in South Korea?
It is a category of supplement product that a licensed pharmacist or registered dietitian divides, combines, and packages on-site to match an individual consumer’s health needs, as determined through a questionnaire, dietary assessment, or genetic test. The category was created by South Korea’s Ministry of Food and Drug Safety in 2020 as a formal legal product class under the Health Functional Foods Act — distinguishing it from both factory-manufactured supplements and medical prescriptions. Consumers receive individually assembled daily-dose packets rather than off-the-shelf products.
Why does South Korea’s approach to personalized supplement regulation matter to other countries?
No other major jurisdiction has formalized personalized nutrition retail as a regulated commercial category. The United States, European Union, and United Kingdom have all documented the absence of a regulatory framework for personalized nutrition services. South Korea’s enforcement sweep and concurrent GMP rulemaking are generating the first field data on how large-scale, point-of-sale supplement customization behaves under regulatory scrutiny — data that other regulators are in a position to study as they consider whether and how to govern similar services in their own markets.
What specifically are MFDS inspectors checking at these retailer sites?
Inspectors are examining five areas: hygiene conditions during on-site ingredient dividing and combining; quality management documentation, particularly around reprocessing procedures; labeling compliance on individual daily-dose packets (specifically whether expiry dates are printed); staff qualifications, since only licensed pharmacists or registered dietitians may legally make supplement recommendations; and point-of-sale disclosure of precautions for concurrent use with pharmaceuticals. Inspectors are also collecting product samples for laboratory testing, with results to be published after the inspection period ends August 28.
What do the proposed GMP changes mean for the supplement industry?
The draft amendments would require manufacturers to document all reprocessing procedures and obtain quality management sign-off before beginning them; periodically verify that compressed air systems and lubricants are not contaminating products; and install anti-falsification record management systems for any in-house quality testing. These requirements already apply to food, livestock product, and sanitary product manufacturers in Korea — the amendment closes a gap that has allowed health functional food businesses to operate under lighter record-keeping obligations. Businesses unable to build proprietary systems may use the MFDS’s government-operated Laboratory Information Management System at no cost. The comment period closes August 31.