All 30 'plant-based' melatonin foods Korea tested were melatonin, 27 above the drug dose

The Korea Consumer Agency tested 30 foods sold as "plant-based" melatonin and found that every one contained a compound chemically identical to the melatonin used in prescription drugs in South Korea ^[1]. Twenty-seven of the 30, or 90 percent, exceeded the 2 mg dose commonly prescribed to manage sleep disorders, and the highest delivered 12 mg per recommended daily intake, six times that dose ^[2][3].

The findings were reported on the 16th, sourced to the industry, by Seoul Economic Daily ^[9]. Measured against recommended daily intake, melatonin content across the sample ranged from 0.7 mg to 12 mg ^[4], a spread of roughly 17 times between the weakest and strongest product on the same shelf ^[5]. Only three of the 30 sat at or below the prescription reference dose ^[6]. Several products besides the 12 mg outlier carried 10 mg or more ^[3].

The agency's stated concern is not the molecule but the channel: because these are ordinary foods, consumers can take large amounts over long periods on their own judgment, without a diagnosis or expert consultation, which raises the risk of side effects from excessive intake and misuse ^[7]. All 30 products emphasised being plant-based melatonin, a framing the agency said could encourage indiscriminate consumption ^[8].

The advertising review is where this stops being a consumer advisory and starts looking like an enforcement file. Of 100 online ads for plant-based melatonin foods, 58 were found misleading in ways that could lead consumers to believe the products had been verified for safety and efficacy ^[10]. Some used language mistakable for pharmaceuticals, including "sleep aid" and "anti-arousal agent," despite the products being ordinary foods, while others carried phrases such as "ingredient with proven functionality" and "certified by the Ministry of Food and Drug Safety" ^[11]. Borrowed dose claims are arguable. Borrowed regulatory authority is a much shorter conversation.

For anyone selling in this category, the commercial point is that the differentiator has inverted. "Plant-based" was the reason to pick one bottle over another; the agency's data makes it a description of sourcing that says nothing about how much active compound a consumer swallows. Seoul Economic Daily reports the industry now expects buyers to weigh melatonin content, ingredient type and intake safety instead ^[12], which favours whoever can put milligrams on the front of the pack rather than an origin story.

The repositioning has already begun. Daewon Pharmaceutical's sleep product Kkuljamshot uses a 100 percent plant-derived lime peel extract as its key ingredient rather than containing melatonin itself ^[13], and the article frames products that target sleep without melatonin as an emerging differentiation strategy ^[14]. That is a narrower claim than it sounds, and the agency was explicit that plant-derived ingredients are not automatically safe ^[15]. It advised consumers not to take plant-based melatonin products in large amounts or over long periods, and to consult a specialist where sleep problems persist or where side-effect risk is higher, including children, adolescents and pregnant women ^[16].

Watch whether the Ministry of Food and Drug Safety moves on the 58 percent of ads that implied its own certification, since that is the cleanest violation in the set ^[11]. Watch whether the 12 mg product is reformulated or simply relabelled ^[3]. And watch how quickly "melatonin-free" replaces "plant-based" as the shelf claim, because the second one is now a disclosure liability rather than a moat ^[8].