Some scholars think people avoided ceremonially unclean animals for health reasons. But evidence does not support this suggestion. Horse meat, for instance, is as healthy as beef, yet it was "unclean" because the horse does not have a split hoof (see Leviticus 11:2–3). These rules existed because an unclean animal was not suitable as an offering to God. So, it was likewise not suitable as food for God's people.
Jesus proclaimed all foods clean for Christians (Mark 7:14–19). This teaching was confirmed in Peter’s vision (Acts 10:9–16).