Eating low-fat foods helps keep blood cholesterol levels down. Some fat-free snacks are higher in calories and carbohydrates than the full fat versions. You would get hundreds of calories and an entire day's supply of carbohydrates. I don't need to worry about salt. It's not that salt makes blood sugar go up, but salt can aggravate water retention and high blood pressure.
Salt is a combination of sodium and chloride.
The wear and tear of diabetes on blood vessels makes it harder for your body to get rid of sodium. That's why it's good to limit salt and choose lower sodium foods and seasonings.