3. Frozen vegetables are at least as nutritious as fresh vegetables, and may sometimes actually be healthier. Fresh vegetables are at their nutritional peak at the moment they are picked. However, they often spend days or weeks in transit, in the produce aisle, and in your refrigerator. Over time, vegetable lose vitamins and minerals. However , frozen vegetables are picked and frozen at their peak. Freezing locks the vitamins and minerals in. When you do buy fresh vegetables, try to pick out ones that seem fresh and have been grown locally.