Considerable evidence exists to support the beneficial effects of enzymes, natural and supplemental. And it is obvious that plant enzymes benefit specific conditions. Research dealing with intact absorption of food substrates proves undoubtedly that non-digested food substrates enter the blood and that plant enzymes break down different food substrates that would otherwise be passed into the blood without being fully digested.

From - http://www.lef.org/magazine/mag99/apr99-cover.html