A reverse tolerance, as is commonly associated with marijuana? My experience has been different. I used to be addicted to caffeine. I wasn't measuring my intake

A reverse tolerance, as is commonly associated with marijuana? My experience has been different. I used to be addicted to caffeine. I wasn't measuring my intake, but at times it was probably near a gram a day. Since breaking my addiction, I have caffeine on occasion. A single cup of black tea now has a pretty strong effect on me, where previously it was barely noticeable.