It seems some are concerned about feeding frozen veggies instead of fresh...unless you grow your own or purchase from a farmer's market and use it quickly the frozen veggies (without added salt or other stuff and not processed) can be more nutritional)
Here's part of an ariticle regarding fresh and frozen...link follows
“When fruits and vegetables are picked, they are still, in a sense, living organisms,” says Barbara Klein, PhD, professor emeritus of food science and human nutrition at the University of Illinois at Urbana-Champaign. “But once you take them off the vine, they immediately go into senescence, which is a decay process.” The cell membranes begin to break down, releasing enzymes that cause vitamins and phytochemicals to degrade. The process is irreversible.
Vegetables tend to lose their nutrients faster than fruits. (Strawberries, raspberries and blueberries, interestingly, may continue to gain a cancer-preventing phytochemical, anthocyanin, after they’re picked.) Nutrient loss is also accelerated in any produce that’s been cut, chopped or undergone tissue trauma (such as bruising).
But time itself is your biggest nutritional enemy. Researchers at Pennsylvania State University recently discovered that after eight days of storage at typical refrigerator temperature (about 40 degrees F.), fresh spinach loses almost half its folate, a vitamin-B compound essential for healthy blood and cells and, during pregnancy, for preventing birth defects.
The problem, of course, is that it can take up to three weeks, particularly in winter, for spinach and other fresh produce to travel from the field to your table. That’s where canned and frozen goods come to the rescue.
http://www.lifetimefitness.com/magaz...tArticleId=527