Not necessarily, the issue is that any fruit or veggie actually starts losing the potency of vitimins and minerals shortly after picked, pulled etc. and the process speeds up rapidly after it is cut into / bit etc. Take 2 lemons put em side by side, cut one open and see how much quicker it goes bad.

The longer you wait to consume after the fruit has been broken the less nutrients you are getting. So it follows that store bought juice has significantly less nutrients than fresh from the fruit juice. And you want all of them on this cleanse.

Jeff