Editing Christianity and Judaism (section)

===Taboo food and drink===
{{Main|Taboo food and drink|Kashrut}}
Orthodox Jews, unlike most Christians, still practice a restrictive diet that has many rules. Most Christians believe that the kosher food laws have been [[Supersessionism|superseded]]. For example, they cite what Jesus taught in [[Mark 7]]: what you eat doesn't make you unclean but what comes out of a man's heart makes him unclean—although Roman Catholicism and Eastern Orthodoxy have their own set of dietary observances. [[Eastern Orthodoxy#Fasting|Eastern Orthodoxy, in particular has very elaborate and strict rules of fasting]], and continues to observe the [[Council of Jerusalem]]'s apostolic decree of Act 15.<ref>[[Karl Josef von Hefele]]'s [http://www.ccel.org/ccel/schaff/npnf214.viii.v.iv.ii.html commentary on canon II of Gangra] notes: "We further see that, at the time of the Synod of [[Gangra]], the rule of the Apostolic Synod with regard to blood and things strangled was still in force. With the Greeks, indeed, it continued always in force as their Euchologies still show. [[Balsamon]] also, the well-known commentator on the canons of the Middle Ages, in his commentary on the sixty-third [[Canons of the Apostles|Apostolic Canon]], expressly blames the Latins because they had ceased to observe this command. What the Latin Church, however, thought on this subject about the year 400, is shown by [[Augustine of Hippo|Augustine]] in his work [[Contra Faustum]], where he states that the Apostles had given this command to unite the heathens and Jews in the one ark of Noah; but that then, when the barrier between Jewish and heathen converts had fallen, this command concerning things strangled and blood had lost its meaning, and was only observed by few. But still, as late as the eighth century, [[Pope Gregory III|Pope Gregory the Third]] (731) forbade the eating of blood or things strangled under threat of a penance of forty days. No one will pretend that the disciplinary enactments of any council, even though it be one of the undisputed [[Ecumenical council|Ecumenical Synods]], can be of greater and more unchanging force than the decree of that first council, held by the Holy Apostles at Jerusalem, and the fact that its decree has been obsolete for centuries in the West is proof that even Ecumenical canons may be of only temporary utility and may be repealed by disuse, like other laws."</ref>

Some Christian denominations observe some biblical food laws, for example, the practice of [[Ital]] in [[Rastafari]]. [[Jehovah's Witnesses]] do not eat blood products and are known for their refusal to accept [[blood transfusion]]s based on not "eating blood".