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Why no canned foods? Sodium concerns?

Cans also have linings made of material that can contribute to ingesting microplastics and other uncertainties

Yes. Too much sodium, or oil. Or other nasty substances.

Plenty of canned things that don’t have added sodium or oil though.

In my part of the world this is the norm.

Here too. If I were to pick a can up on the shelf it would likely have 800-1200mg of sodium. But if I look for low sodium beans it has like 100mg.