Benzodiazepines are a central nervous system depressant, and have muscle-relaxing properties (such as valium). Opioids may also be considered CNS depressants, but I am not sure that they cause muscle relaxation.
because it effect daily life if you have crippling depression you cant really do anything because you cant function daily tasks and you can be ham to your self or others
Genetics or lifestyle. Meaning tobacco use, etc.
Meats are rich in protein. The most protein packed food is a whole egg.