Enzymes are as they are and they dont die nor do they live.They are active,inactive or in a state of decay.Enzymes are not as fragile as some think they are,most of the info. is sales hype.A single gear mastication juicer is the best all around juicer and the omega is a good one.I personally own a greenstar2000 and a breville elite.If you have to start with a juicman junior or a jack lalane then just do it.They can be purchased locally and they are fairly cheap.Good luck and happy juicing.