I'm thinking maybe parasites.
If they're there, they'll be having your lunch.
I know they're in the vegetables just naturally and wouldn't be a problem except for the amount of chemicals in our environment which gets into our bodies and causes the parasites to make a home and multiply.
Or maybe you are in need of more potent vegetable sources like the wheatgrass juice and also home grown sprouts.
These were two foods which Ann Wigmore popularized and are superfoods.
The woman was amazingly healthy when she was in her eighties and animal products were not in her diet.