[marklubi]

Similar thing with orange juice. The producers add 'flavor packs' to adjust the taste for different regions of the US.

My son and I travel all over the US for various competitions, and there are certain regions where he refuses to get OJ because of the flavor differences.

[MiddleEndian]

I never looked into why, but when I moved from Boston to Seattle, I noticed dairy products (milk, cottage cheese) tasted different in Seattle. Confirmed it again when I moved back to Boston.

[marklubi]

Haven't noticed that one. Oxidation perhaps, or maybe salt in the air based on the locations?

West coast food (particularly oysters) seems to be a little bit more salty/briny.