A yummy seasoning called 'Everything but the Bagel' is loved by many people, but it's not allowed in South Korea.
The seasoning has tiny seeds called poppy seeds, and those seeds can sometimes have a bit of medicine in them that's not allowed.
Even though it's unlikely you'd get in trouble for using the seasoning, South Korea has rules against it.
So, for now, you can't bring the seasoning to South Korea, but maybe someday you can!