This is the most incredible read ever holy !!!! Khem source . Cell Salt source too hands down , but just look at what they knew and Scribed(only Scribes were the writers of the language , they had to become a priest first(wisdom) then an astrologer , scientist , Dr) …. then they were a scribe/recorder on papyrus/walls tombs temples , etc .
… link to article … http://www.wrf.org/ancient-medicine/oldest-medical-books.php