I was told by my natropathic doctor that taking enzymes is fine. Once you stop, your body will produce them again!
That is like saying when you stop morphine your body will start making its own dopamine again. Yes, this can happen but it takes time and you will experience problems in the meantime.
In addition, most enzymes also contain betaine HCl that will shut down your stomach acid formation. This is a greater problem since the nutrients needed to produce stomach acid are acid dependent for absorption. Therefore, when the person shuts down their stomach acid production then goes of the betaine HCl there is no acid to absorb the nutrients needed to create more acid and they end up in a downward spiral of digestive disorders.