Joseph Jenkins, in the Humanure Handbook, goes into great detail on the safety of the system. He has been using the system for over 40 years and in his book, he details how he has and does use the material on his garden plants.
Do you use your humanure on your garden?
Below is a great quote from this thread
https://permies.com/t/132129/composting/Humanure-Willows.
Here is the original question:
Upcycle Goods wrote:I think it's unsanitary to use composted humanure on things that you will eat (like orchard trees and other plants in the garden) is that right?
Rebecca Norman wrote:I would highly recommend that you get the Humanure Handbook and read it, because it addresses this exact question in a lot of detail. If humanure is composted as described in the book there is little to no chance of pathogens still being in it when it is transferred to the soil. (Even if there were, plants don't take them up into their tissues and deposit them out in the fruits on the branches). Though if you personally feel uncomfortable with using humanure on food plants, you can easily use it on ornamentals and mulch producing plants etc. But in terms of hygiene that's not necessary, and all the details and references are the Humanure Handbook.