If you read Pregos or most other 'supermarket' brands of tomato /marinara
sauce, they are loaded with, for example:

SOY, CORN SYRUP and tons of other junk....yuck

I was happy to find at Whole Foods a marinara sauce taht appears to be paleo:

It's called Don Pomodoro and is made in Italy.

The ingredients are: pulp of tomatoes, extra virgin olive oil, garlic,
onion, basil, salt.