Quoting one of the reply [0] from the linked thread in the OP:

Nicotine is considered one of the most (if not THE most) physically and psychologically addictive substances in the entire world. Prior to introducing nicotine into your body, there is no compulsion for your body want/need it. However, as SOON as you introduce it for the first time, it gives birth to a "little monster" of need within you. This monster will remain within you until the day you die. Sure, eventually you can starve this "little monster" down into a tiny little husk, so that it no longer has any effect on you, but there's always going to be that slight twinge... That slight trickle in the back of your mind that something's missing. I feel that once you go down the road of nicotine you'll forever regret it.

However, if you have been a smoker I guess it's alright to try but,

Another interesting thing I found in the same thread is the Moderator's note [1]:

The study below demonstrates that nicotine, regardless of administration method causes Smoker's Melanosis, and it is likely that by extension, whether specifically demonstrated or not, this action will accelerate the visible signs of skin aging by a similar uneven discoloration and an increase in the number of moles which smokers and their families get.

The long-term effect of nicotine on the oral mucosa [2].

So, it's still not safe completely. I have been a smoker and I quit long ago but after reading the article I'd still stick with the good ol' coffee!

0: https://www.longecity.org/forum/topic/23915-nicotine-patch-f...

1: https://www.longecity.org/forum/topic/23915-nicotine-patch-f...

2: https://www.ncbi.nlm.nih.gov/pubmed/10605870

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