Accepted answer
This is an area where calm process knowledge is more useful than either reassurance or alarm.
The commodity description on the declaration is what drives classification. A vague description invites a query; an accurate one is processed on the classification it deserves.
A seizure notice, where one is issued, is a formal document with a stated basis and a response deadline. It is worth reading carefully and, if the amount matters, worth advice.
Import duty and tax thresholds are published per jurisdiction and are independent of whether goods are permitted.
Nothing here is medical advice, and research-use compounds are not approved for human use.
Never answer a query with an inaccurate description.
edited 26 Jun 2026 by lukas_sedlacek — added a caveat about sampling