Nicotine is found in tobacco plants, tomatoes, eggplants, sweet peppers, and potatoes.

“Now obviously nicotine is found in the tobacco plant, but nicotine is also found in nightshades. That is tomatoes, eggplant, and sweet peppers. Although the concentrations of nicotine in tomatoes, eggplants, and sweet peppers is vastly lower than it is in the tobacco plant. You actually can also find nicotine in potatoes.”