In the name of Allah the most compassionate, the most merciful.
Qur’an, al-qur’an literally means the recitation in arabic, the original arabic text is the final revelation from Allah(God). A book of divine guidance and direction for all mankind.
Allah (god) the creator, the legislator, the compassionate, the merciful to man and the animal has said clearly in the last holy book al Qur’an:
Translated verses of the Quran
“O ye who believe! Eat of the good things wherewith We have provided you, and render thanks to Allah if it is (indeed) He whom ye worship” (2:172).
“He hath forbidden you only carrion, and blood, and swineflesh, and that which hath been immolated to (the name of) any other than Allah. But he who is driven by necessity, neither craving nor transgressing, it is no sin for him. Lo! Allah is Forgiving, Merciful” (2:173).
“O ye who believe! Fulfill your undertakings.The beast of cattle is made lawful unto you (for food) except that which is announced unto you (herein), game being unlawful when ye are on pilgrimage. Lo! Allah ordaineth that which pleaseth Him” (5:1)
“Forbidden unto you (for food) are carrion and blood and swine-flesh, and that which hath been dedicated unto any other than Allah, and the strangled, and the dead through beating, and the dead through falling from a height, and that which hath been killed by (the goring of) horns, and the devoured of wild beasts, saving that which ye make lawful (by the death-stroke), and that which hath been immolated unto idols.
And (forbidden is it) that ye swear by the divining arrows. This is an abomination. This day are those who disbelieve in despair of (ever harming) your religion; so fear them not, fear Me! This day have I perfected your religion for you and completed My favour unto you and have chosen for you as religion Al-Islam. Whoso is forced by hunger, not by will, to sin: (for him) lo! Allah is Forgiving, Merciful” (5:3)
“They ask thee (O Muhammad) what is made lawful for them. Say: (all) good things are made lawful for you. And those beasts and birds of prey which ye have trained as hounds are trained, ye teach them that which Allah taught you; so eat of that which they catch for you and mention Allah’s name upon it, and observe your duty to Allah. Lo! Allah is swift to take account” (5:4)
“This day are (all) good things made lawful for you. The food of those who have received the Scripture is lawful for you, and your food is lawful for them. And so are the virtuous women of the believers and the virtuous women of those who received the Scripture before you (lawful for you) when ye give them their marriage portions and liven with them in honour, not in fornication, nor taking them as secret concubines. Whoso denieth the faith, his work is vain and he will be among the losers in the Hereafter” (5:5).
“And eat not of that whereon Allah’s name hath not been mentioned, for lo! it is abomination. Lo! the devils do inspire their minions to dispute with you. But if ye obey them, ye will be in truth idolaters” (6:121).
Anything which is harmful to the body falls under the makruh or haram based upon the aya in the holy Quran which directly states that we should not kill ourselves by our own hands;
“…do not throw yourselves with your own hands into destruction. You shall be charitable; GOD loves the charitable.” (Glorious Quran 2:195)
As it is well known that over consumption and other habit such has smoking causes many kinds of ills, it falls under this aya. And Allah swt knows best.