I have lots of lettuce, beetroot, zuchini and sour cherries which are ready to pick, way more than u can eat. I have therefore been juicing them and returning the pulp to the compost pile (and some directly into the beds) to grow even more super nutricious organic food.
For fertiliser I have been using stinging nettle and cow dung "tea" and diluted urine. these seem to be working very well.
Juice fasting (although I've not been juice fasting, just drinking juice and eating less food at the moment) is extremely healthy for the physical body, and, especially combined with colon cleansing for extended periods (a month or more) can help to cure most disease. Always best to combine with an "emotional" healing modality for the root cause otherwise physical disease is likely to return.
Namaste
Atma