it depends on a whole host of factors, even coming down to your own body composition and lung capacity
If people used, say, a nicotine patch, "you might find that patients do lose weight but then become dependent on a patch all the time," says Michael Cowley, who directs the Obesity and Diabetes Institute at Monash University in Melbourne, Australia
Normal tobacco has 4000 chemicals
But for people who already smoke and want to quit, but don't want to put on weight, she says, nicotine gum or a patch might help
Dr Tedros Adhanom Ghebreyesus, the WHO director general, told the conference that progress in tobacco control was fragile
Within the Cannabis genus are many, many different strains, each one with a unique chemical makeup