Food and beverages have barriers since the EU subsidises those inside the free market. In turn that also causes Norwegian food prices to be massively inflated compared to its EU's peers (like Sweden and Denmark).

When traveling to Norway I notice a lot how the food is both lower quality (in taste, not in safety) while being quite a bit more expensive than in Sweden.

The major political block hanging over Norway's EU ascension are fisheries and agriculture since those industries don't know how they would compete against cheaper EU products.