There are many "health laws" not related to food, should those be kept ?
I am not sure which ones you are think of, but I would assume any law for good health should be kept.
How about the sabbath, should that be kept, even though God said it was specifically a sign of the Covenant between he and Israel ?
There are 3 requirements about keeping the Sabbath: Remember it---keep it holy and no working.
Ex 31:13We need to remember who sanctified us.
Deut 5:15 - We need to remember who freed us from bondage.
IMO, we keep it holy by remembering what God has done for us.
IMO we are not to work for our sanctification or our freedom from bondage(basically the law). That is like saying we don't believe God has done those things for us.
Also, the Sabbath is a shadow of the good things to come---Col 2:16-17.
There remains a Sabbath rest for the people of God(Heb 4:9).