The Effects of Processing Vegetables There is a variety of different ways to process a vegetable, but is it the same vegetable when it comes out as it went in? Vegetables are sold canned, frozen and fresh just about everywhere. Posing the question, are they equally as nutritious? Nutrition is a topic concerning Americans today considering since 1991 when 4 out of 45 states had obesity rates of 15% or higher, now 37 or more out of 45 states have those same rates. It is a rising problem among Americans today. Nutrition is the science explaining the study of foods and their relation