At the time of writing this we are not aware of any restrictions in any country. MetaBuz™ is a manufactured powdered blend of spices and lots of people travel with these every day.
It is different to raw bark, leaves or plant material which can harbour pests, seeds and plant diseases.
We recommend that you declare it just to be on the safe side. Allow the authorities to process the matter. If any person does have problems please let us know the details so we can post it here.
We will consider replacement of product in the unfortunate event that an entry problem into a foreign country does occur.