Ok first off where do you get the idea that eating, drinking, smoking, etc is a sin.
I do not see any of these in the 10 commandments:
1) Thou shalt have no other God.
2) Thou shalt not make or worship graven images.
3)Thou shalt not take the Lord's name in vain.
4) Remember the sabbath day to keep it holy.
5)Honor your father and your mother.
6) Thou shalt not kill.
7) Thou shalt not commit adultery.
8)Thou shalt not steal.
9) Thou shalt not bear false witness.
10) Thou shalt not covet.
(Exodus Chapter 20:1-17)kjv
And Jesus summed these up in Love the Lord thy God with all your heart, mind, and soul. And love your neighbor as yourself.
These to also have nothing to do with harming yourself. Wait before you go on a rant. I am not saying hurt yourself, But maybe you should ask yourself why you like to allow the doctrines of man to put a yoke around your neck.
The only bible verse that could even come close to your argument is:
1Cor 3:17 "If any man defile the temple of God, him shall God destroy; for the temple of God is holy, which temple ye are."
Now sure if you want to use this one verse to condemn everyone who has ever done any harm to their body then sure go for it. But please do not make a biblical stand on one verse.
Also for arguments sake I would like to say that even food you eat and drink is bad for now a days have you ever even read your ingrediants.