If you are not sure whether the items you are carrying are prohibited, you should declare them on the entry form. If the declared items are prohibited, they will be confiscated at most, but you will not be fined or deported ?
3 Answers

Everything that can be eaten with your mouth must be declared. Then seeds, wood products, and anything with soil must also be declared.

We declared cold medicine and the like, no problem.

Entry is not as strict, we did not check anything