This is an a "must read" article for anyone who has struggled with addiction. It's "lay reader friendly" and gives some fascinating evolutionary history about human genetic vulnerabilities to addiction. Plus the authors through in some cool stuff about the God gene and pair bonding (which sounds curiously like things we've written....).
The one caveat is that members of the research team are trying to market their supplements for correcting dopamine imbalance, so take those suggestions with a grain of salt. It's likely that exercise, diet and meditation (and perhaps karezza) can accomplish the same goal and offer greater benefits over all.