Originally Posted by
peptideguru
As pwarbi said, many people who have suffered from addictions can reform addictions more easily.
Even though the substance itself may not be physically addictive, anything that stimulates the serotonin and dopamine receptors in brain can cause a psychological addiction.
Even something as simple as her thinking a given substance is helping her or making her look/feel better is enough to trigger an addiction.
It's not guaranteed, but people with addictive tendencies are more prone to psychological addiction and thus it's advised to avoid the situation entirely.