Living in a tropical country, it's pretty hard to find those large sweet tomatoes that we see on tv. Our tomatoes here in usually come in the small tart variety.
Anyways, after researching on how to make a basic tomato sauce, I looked into canned tomatoes and discovered something that I really hadn't thought about before. If you take a look at the ingredient list of canned tomatoes, it should only say "Tomatoes, Tomato Juice" and that would mean that the tomatoes were picked and canned at the perfect ripeness. Oh, and some citric acid as an acidity regulator. But when I checked out most of the local brands, most of them contained stuff like salt, sugar, calcium chloride, msg and other stuff.
This just made me laugh as I know a lot of people who say that they never use MSG and that MSG gives them headaches etc etc etc, and then they use all sorts of convenience products like magic sarap, broth cubes, ready-to-use sauces and the like. It's no wonder they say that their food is so yummy and they use very little salt. Reality check, read the labels, you'd be surprised at how much salt you've already dumped into your food.