So I haven't smoked since my operation last year on valentines day (smoking did not play a factor in my oral cancer, confirmed by many cancer specialists and oncologists but once my mouth recovered after the radiation treatment sometime in May of last year the cravings came back.
So I started chewing nicotine gum after researching online that there is no conclusive evidence to support nicotine causes cancer per the medical journals I read.
I've been chewing the gum for a while for two reasons 1) it cures the urges and 2) makes my mouth produce more salvia.
Well my oncologist told me to stop chewing it and that it can cause cancer. My regular doctor said no it doesn't.
What have you heard or what do you think?

I'll make this short. Let's assume there is conflicting and debatable studies about nicotine's role in cancer.

If this were a coin toss -- nicotine does contribute to cancer or nicotine does not, which side do you pick?

Pretty simple -- How much do you want to gamble the rest of your life, especially someone as young as you my dear friend?

There is biotine gum that stimulates saliva and it does not have nicotine so safe to chew. :-)

I'm starting to ween myself off of it. But you're completely right. What's funny to me is my oncologist said I can drink

Drink - as in ONE beer once or twice a week is what he is thinking, not a couple 40s every night. :-)