Caffeine, possibly. I have a pretty strong caffeine addiction myself. But the harm level of caffeine vs alcohol, tobacco, or anything else harder, is far far le

Caffeine, possibly. I have a pretty strong caffeine addiction myself. But the harm level of caffeine vs alcohol, tobacco, or anything else harder, is far far less. Sugar, no, it doesn't bind to transduction receptors in the same way (it is rewarding, but not like "drugs" are).