God gave the Israelites rules about eating and washing for two reasons. First, to keep them healthy and second, as a discipline to help them in their daily disciplines to Him. Do they still apply? For some, they are convicted by His Spirit to keep the laws, but not by all. He holds some to different disciplines and different requirements than others. Not because the things God wants you to avoid are necessarily evil in themselves, but because He knows those things can lead you down a spiral of temptation and sin.