Enzymes and Trace Minerals: How Important are they to add to our diet?

I am wondering if any naturopathic doctors and/or nutritionists can discuss the importance (or not) of adding enzymes and trace minerals to our diets.

I am not sure what different types of enzymes there are, but am assuming they are "digestive enzymes". And, the trace minerals I was reading about said specifically "ionic, plant-based trace minerals". What exactly are these, where can they be found? Do we need to spend hundreds of dollars at health food stores, or are they readily available in foods in adequate amounts? What are the pros/cons?

Thanks!