Is nicotine (as an ingredient) extracted from tobacco?

[Stephen Tashi]

Is tobacco the source of the nicotine that used as in ingredient in compounds for electric cigarettes, chewing gums etc.? If so, is it extracted from varieties of tobacco that are considered high quality for use in (conventional) cigarettes? - or can inferior quality tobacco be used?

 

[Bystander]

"Extract," refine, process...what do you think?

 

[collinsmark]

Here's something from Medical News Today:

Nicotine is a chemical that contains nitrogen, which is made by several types of plants, including the tobacco plant. It is also produced synthetically.

(Source: https://www.medicalnewstoday.com/articles/240820#_noHeaderPrefixedContent)

Quite a bit more detail is in the source, although not so much about its manufacture.