In the US, there are plenty of canned tomato products -- sauce, crushed, puree, whole -- that are pretty much just tomatoes. I find that it's hard to beat canned tomatoes, because the fresh tomatoes available at the supermarket are cardboard. The canned sauces can be canned close to where they're picked, and thus don't have to be optimized for transportation and storage. And they're convenient.
Like the article says, the glass jar stuff is loaded with sugar.
Of course I still enjoy fresh tomatoes from my garden every summer, but am not too disappointed if I don't get enough to freeze or can.
Pretty much just tomatoes, and then loads of salt. I have to hunt around to find some that don’t have 20% of my daily sodium, per serving. It’s fine to eat 20% in one serving of a meal, but tomatoes are always accompanied by other stuff, including ingredients that are always salty, like cheese.
Like the article says, the glass jar stuff is loaded with sugar.
Of course I still enjoy fresh tomatoes from my garden every summer, but am not too disappointed if I don't get enough to freeze or can.