The Old Testament Rules and Regulations all pointed to a higher truth that was to be fulfilled when Christ came. In regards to food restrictions here is what was revealed in the New Testament:14Again Jesus called the crowd to him and said, “Listen to me, everyone, and understand this. 15Nothing outside a man can make him ‘unclean’ by going into him. Rather, it is what comes out of a man that makes him ‘unclean.’ " 17After he had left the crowd and entered the house, his disciples asked him about this parable. 18"Are you so dull?” he asked. “Don’t you see that nothing that enters a man from the outside can make him ‘unclean’? 19For it doesn’t go into his heart but into his stomach, and then out of his body.” (In saying this, Jesus declared all foods “clean.”)
20He went on: "What comes out of a man is what makes him ‘unclean.’ 21For from within, out of men’s hearts, come evil thoughts, sexual immorality, theft, murder, adultery, 22greed, malice, deceit, lewdness, envy, slander, arrogance and folly. 23All these evils come from inside and make a man ‘unclean.’ " - Mark 7
There are similar passages like this in other parts of the New Testament as well.