What is the link between heredity and tobacco addiction

Addiction can be hereditary. Studies have shown that children of addicts are 8x more likely to develop an addiction. We all have genes that can give us addictions. It’s caused by the reward system of the brain. When you do something you like, your brain rewards you by releasing serotonin aka “happy chemicals”. Versus, without that fix, you become depressed, which ultimately leads to addiction in order to obtain that happiness.

His goal is  achievable, realistic, measurable, and time-based. : )