OfCourseNot

Yes just a pinch, only if necessary. The second one says ‘no sugar added’ so it might as well be the sugars from all the ingredients.

This is good advice. And also carrots.

It’s pretty common to add a bit of sugar to tomato sauce tho.

That’d be a contraction of ‘would’ in this case, wouldn’t it? As an ESL speaker I used to find these grammar ‘mistakes’ (for lack of a better word) made more difficult for me to parse the sentences. As with code ‘written once but read many times’ would apply here.