Does Christianity allow eating pork and horse meat, which even though it is prohibited by the Jewish Law? I am a Malaysian Muslim and am very curious about Christian diets. I've heard that Christianity prohibited eating Pork and Horse Meat but why do my Presbyterian classmates always eat both Pork and Horse Meat food for their lunch at my school?  As a Muslim, I eat Horse meat since it was allowed in Islam but my Presbyterian Christian classmates have ask a bit of my horse meat burger patty lunch food a few month ago. I also have warm them because I really respect my friend's religious beliefs, and said "this horse meat lah you Christian cannot eat kan?" but they did tell me Christianity allowed everything. So I'm curious about this.
Dietary rules among Christians vary from sect to sect. The starting point for understanding the Christian views on food regulation is in the book of Acts, chapter 10, when Peter has a vision and is told that he may eat any kind of food, even unclean food that does not meet Jewish regulations, such as pork. This is symbolic: Peter was told that Gentiles who are "unclean" by Jewish custom may join the Church and become Christians. However, it is also understood in a literal sense: Christians may in fact eat any food in normal circumstances.

However, there are circumstances in which a Christian should abstain from eating certain foods. This rule is binding on all small "o" orthodox Christians:


  1 Corinthians 8:
  
  8 Now about food sacrificed to idols: We know that “We all possess
  knowledge.” But knowledge puffs up while love builds up. 2 Those who
  think they know something do not yet know as they ought to know. 3 But
  whoever loves God is known by God.[a]
  
  4 So then, about eating food sacrificed to idols: We know that “An
  idol is nothing at all in the world” and that “There is no God but
  one.” 5 For even if there are so-called gods, whether in heaven or on
  earth (as indeed there are many “gods” and many “lords”), 6 yet for us
  there is but one God, the Father, from whom all things came and for
  whom we live; and there is but one Lord, Jesus Christ, through whom
  all things came and through whom we live.
  
  7 But not everyone possesses this knowledge. Some people are still so
  accustomed to idols that when they eat sacrificial food they think of
  it as having been sacrificed to a god, and since their conscience is
  weak, it is defiled. 8 But food does not bring us near to God; we are
  no worse if we do not eat, and no better if we do.
  
  9 Be careful, however, that the exercise of your rights does not
  become a stumbling block to the weak. 10 For if someone with a weak
  conscience sees you, with all your knowledge, eating in an idol’s
  temple, won’t that person be emboldened to eat what is sacrificed to
  idols? 11 So this weak brother or sister, for whom Christ died, is
  destroyed by your knowledge. 12 When you sin against them in this way
  and wound their weak conscience, you sin against Christ. 13 Therefore,
  if what I eat causes my brother or sister to fall into sin, I will
  never eat meat again, so that I will not cause them to fall.


Thus, if a Christian has a friend who is offended by something he eats, he should avoid eating it in their presence so as not to harm their friendship or confuse the person about what is right or wrong. The above prohibition is meant to keep Christians from openly participating in the rituals of other faiths and prevent syncretism. Also, since many people keep pets, it is frowned upon to eat animals kept as pets by people we know.

Many religions ban the consumption of alcohol. Some Christian denominations do, but most teach that so long as one does not become intoxicated, they are free to drink alcohol. My personal practice is to never drink in the presence of people I know are struggling with current or past alcoholism, so as not to cause them to stumble.

Some Christian denominations ban the use of tobacco, or the consumption of caffeine, but most permit it.

I was directed by one of the commenters to this passage from Matthew 15, which gives Jesus' opinion on the matter. He said that our speech and conduct is more important than our diet when it comes to pleasing God:


  1 Then some Pharisees and teachers of the law came to Jesus from
  Jerusalem and asked, 2 “Why do your disciples break the tradition of
  the elders? They don’t wash their hands before they eat!”
  
  3 Jesus replied, “And why do you break the command of God for the sake
  of your tradition? 4 For God said, ‘Honor your father and mother’a and
  ‘Anyone who curses their father or mother is to be put to death.’b
  5 But you say that if anyone declares that what might have been used to
  help their father or mother is ‘devoted to God,’ 6 they are not to
  ‘honor their father or mother’ with it. Thus you nullify the word of
  God for the sake of your tradition. 7 You hypocrites! Isaiah was right
  when he prophesied about you:
  
  “ ‘These people honor me with their lips, but their hearts are far
  from me. 9 They worship me in vain; their teachings are merely human
  rules.’ ” 10 Jesus called the crowd to him and said, “Listen and
  understand. 11 What goes into someone’s mouth does not defile them, but
  what comes out of their mouth, that is what defiles them.”