Tahlia chased the release of dopamine by using crystal meth. She says it wasn't until her second prison stint that she rewired her brain.

Experts say that the neurotransmitter dopamine plays a role in more of our habits and behaviours than we might realise.

Tahlia chased the release of dopamine by using crystal meth. She says it wasn't until her second prison stint that she rewired her brain.

Tahlia chased the release of dopamine by using crystal meth. She says it wasn't until her second prison stint that she rewired her brain.