The first separately printed treatise on diet was written by the Egyptian-Jewish physician and philosopher Isaac Judaeus who lived from about 832 to 932 CE. He was also known as Isaac Israeli ben Solomon and Abu Ya'qub Ishaq Sulayman al-Israili. The Latin edition was a translation made from the Arabic, circa 1070, by Constantine the African (Constantinus Africanus). De particularibus diaetis was a portion of " 'Kitab al-Adwiyah al-Mufradah wa'l-Aghdhiyah,' a work in four sections on remedies and aliments. The first section, consisting of twenty chapters, was translated into Latin by Constantine [the African] under the title 'Diætæ Universales,' and into Hebrew by an anonymous translator under the title 'Ṭib'e ha-Mezonot.' The other three parts of the work are entitled in the Latin translation 'Diætæ Particulares'; and it seems that a Hebrew translation, entitled 'Sefer ha-Mis'adim' or 'Sefer ha-Ma'akalim,' was made from the Latin" (Wikipedia article on Isaac Israeli ben Solomon, accessed 06-08-2009). A more complete printed edition of the text appeared in Basel in 1570. Campbell, Arabic Medicine and its Influence on the Middle Ages I (1926) 73. ISTC no. ii00176000. Digital facsimile from Regensburger Reichsstädtische Bibliothek Online (RRBO) at this link.