Hopefully nothing, that is, if you follow Christ's commandments.
I assure you that I don't believe the "once saved always saved" doctrine. As far as doing anything I want to, I must assume that you don't read many of my posts. Those who live in sin are in deep trouble with God, 'Christians' or not.
I think you have it backwards. It's up to you to prove that Christians are bound to obey all of the Law of Moses.Pulling that one verse apart from the 1 Timothy 4:3 verse is often done to try and make the Scripture justify us eating anything we want. Paul was specific as to which meats he was talking about with meats that God created to be received. That means strike out those meats God did NOT create to be received, for Paul was not including those in his discussion.
Paul's Message there is indeed about those today who want us to deny the eating of meats. Yet it is not about eating just any meat, for Paul was specific of which meats he was talking about. I'm not going to judge anyone for what they eat, but I won't deny how God created certain things for our body that are healthy for us either. Each believer must decide for theirself what they will do regarding this matter.
If you know of NT dietary restrictions then please tell us. I don't know of any.