system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: how does alcoholism run in a family?

I under stand cancer and diabetes but if alcohol is an out of body deal how it is it possible for it to be genetically in a family?
gpt
Biochemist here--Our genes code for proteins that impact many things that can relate to alcohol addiction, including how our body metabolizes (breaks down) alcohol, and how our brain responds to it.

In particular, some people inherit DNA that makes them have a higher liklihood for their brains to enjoy alcohol and to become biochemically dependent on it. This can also occur for other substances too, even cigarettes.

There can also be other traits and conditions that someone can inherit from their parents that can make them more prone to alcohol misuse, such as biopolar disorder and ADHD.

edit: The expression of these genes can be affected by environmental conditions as well, so it can get very complicated.