Korea has a formal regulatory category for health functional foods, marked with a specific certification symbol on the package. That symbol means something in Korea and nothing in the US, where the same product is treated as a dietary supplement under a different framework.
What the Korean certification mark means
Products carrying the health functional food designation have been reviewed by Korean authorities for a specific functional claim. The mark appears on the front of the package alongside the approved claim. This is a Korean approval and does not carry over to US regulatory status in any way.
How the US treats the same product
Imported supplements fall under US dietary supplement rules, including labeling requirements and restrictions on certain ingredients. Personal-use quantities are handled differently from commercial imports, and both the thresholds and the ingredient restrictions change, so check current guidance rather than relying on what worked last year.
Ingredients that draw scrutiny
Products containing animal-derived components, certain herbal extracts, or ingredients regulated as drugs in the US are the ones most likely to be held. If the Korean product page lists an ingredient you cannot identify, translate the full ingredient panel before ordering.
Practical quantities
Ordering a two or three month personal supply of a single product is a very different proposition from ordering a case of twelve. Keeping quantities modest and clearly personal is the single most useful habit in this category.
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Start a buy-for-me order →Frequently asked
Can a shopping service ship supplements?
Many will handle shelf-stable supplements in personal quantities, but policies vary by service and by route. Ask before ordering.
Does the Korean certification help at US customs?
No. It is a Korean regulatory mark and has no standing in US import review.
What if a shipment is held?
Held food and supplement shipments are usually resolved through documentation or returned. Accurate declaration up front reduces the chance considerably.