Here's a little bit of info I learned today. Eggplant is richer in nicotine than any other edible plant, with a concentration of 100 ng/g (or 0.01 mg/100g). However, the amount of nicotine from eggplant or any other food is negligible compared to passive smoking. On average, 20 lbs (9 kg) of eggplant contains about the same amount of nicotine as a cigarette.
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