What are some of the most common types of sleep disorders at the end of your job before you retire?

Insomnia. This is a complex subject. Sleep is of vital importance so there are many parts of the brain that are involved in the process of sleep. Thus, like all brain functions it requires good cellular chemistry. I suggest that you go tgo my blog "oxyygen the spark of life" where you may pick up some clues. You vcan google it.