Maybe it was the MSG and other artificial flavorings that caused the addiction. Some guy on Coast to Coast claimed that MSG can be extremely addictive, in addition to causing migraines, drowsiness, etc. Of course the next night's guest insisted that half of earth's inhabitants are descended from extraterrestrials, so I don't know how reliable Coast to coast's guests are.
>>>Maybe it was the MSG and other artificial flavorings that caused the addiction.
IMO, it is the nicotine. Potatoes are a nightshade plant. Even though most of the nicotine is in the leaves, it does get to the fruit too.