Nicotine has been detected in potatoes, tomatoes, eggplants, and sweet peppers, all food plants and members of the large family Solanaceae.

1. Nicotine
Rich
Foods
Tomato
As hard as it is to believe, tomatoes do
contain some amounts of nicotine. It has
a net weight of 7.1 to 7.3ng/g. What
this translates to is about 7.1 ng of
nicotine for each gram a tomato has.
However, it is said that the nicotine
content reduces when the tomato ripens
and it contains a nicotine alkaloid
known as tomatine.
Potato
This is a vegetable that contains a
nicotine alkaloid known as solanine,
mostly found in the peel. A potato has an
average weight of 15ng/g but goes to
about 42.8ng/g if the potato is green or
still budding while the ripe ones contain
as little as 4.3ng/g net weight. If you get
pureed potatoes, then the amount shoots
up to about 52ng/g. Such high nicotine
content is said to have fatal implications
on human health.
Eggplant:
Also known as aubergines, these contain
about 100ng/g of this harmful
substance. This may be the highest
nicotine reading next to tobacco
products. This loosely translates to the
fact that about 10 kilograms of
eggplants could contain the nicotine
content of a cigarette. Examples of food
recipes you might want to cook an
eggplant are always available on the
web.
Teas
As much as tea is one of the healthiest
beverages around, it also contains some
amount of nicotine. Green and black tea,
whether caffeinated or decaf, does
contain some nicotine. Black tea, for
example, has content of about 100ng/g
of nicotine. Instant tea, as compared to
natural brewed tea, may have a nicotine
reading going up to 285ng/g.