Many people wonder whether or not frozen vegetables are less nutritious than fresh vegetables. It seems that they would be, simply because many people assume that foods which have been processed are bound to be less nutritious than otherwise. In fact, the truth appears to be that frozen vegetables are at least as nutritious as fresh vegetables — and in some situations may actually be more nutritious.

Part of the confusion no doubt arises from the fact that vegetables lose much of their nutritional value when other preparation techniques are used. Proponents of a raw food diet will discourse at length about the health benefits of eating vegetables that haven’t been heated past a certain temperature. Canned foods are undoubtedly less nutritious than fresh vegetables, because they are cooked for a very long time, and then packaged with a great deal of salt. Frozen vegetables, however, are not heated up, and so do not undergo the same denaturing of proteins or loss of vitamins in waste water.

The term “fresh vegetables” needs to be looked at a bit closer to determine whether frozen vegetables might actually even be more nutritious. Truly fresh vegetables, of course, are vegetables that you pick out of your own garden, or are perhaps purchased at a farmer’s market the day they’ve been harvested. These vegetables are ideally picked at the peak of their freshness, and if you prepare them that evening they will be chock full of minerals and vitamins.

When most people talk about fresh vegetables, they mean vegetables purchased at their nearby supermarket, an aisle or two away from the frozen vegetables. These vegetables aren’t nearly as fresh as those from your own garden. In many cases they’ve spent days or weeks in transit, and then some time in the produce aisle. Over that time, vitamins and minerals have leeched out, and by the time you buy them and prepare them, they are far from their peak ripeness.

Frozen vegetables have been picked at the peak of their ripeness, and immediately flash frozen. As a result, all of the minerals and vitamins are locked in, ready for your benefit. This means that in some cases, frozen vegetables might be more nutritious than vegetables purchased from the produce aisle which have been sitting for weeks. Frozen vegetables may also have the outer cellulose layer already broken as a result of the freezing, making it easier for your body to digest the vegetables.

There are some things that may make frozen vegetables less nutritious than fresh vegetables. Avoid frozen vegetables that have sugar or salt added — good frozen vegetables should just have the vegetables listed in the ingredients. Also take care that you don’t leech out the good nutrients by boiling the frozen vegetables for a long time — the less the vegetables are boiled, in general, the more vital ingredients they will retain.

So, are frozen vegetables less nutritious than fresh? The answer seems to be a resounding no. Of course, fresh vegetables usually have much richer flavors, and most people find the texture preferable. But if these things don’t bother you, and you prefer the convenience of frozen vegetables, nutritional issues shouldn't be a concern.