Scientists have struggled to pinpoint exact methods by which vinyl chloride causes liver angiosarcoma, but most thought that it was inhaled first, and then transferred into bloodstream where liver attempts to filter it. When liver fails to filter chemical, it causes serious mutations to liver cells, resulting in angiosarcoma. Like B.G. Goodrich cases, numerous more cases were seen in hairdressing industry. It was later learned that these beauty shop workers used aerosol cans that have vinyl chloride acting as a propellant for spray. As a result, government revised original protective measures to limit vinyl chloride to one ppm per day.

Some people seem to lose all their energy and drive, wanting only to sleep. Others react in exactly opposite way, becoming so over energized they can't find enough activity to burn off their excess energy. For instance, one woman said she cleaned out all her closets completely and was ready to go next door to start on her neighbor's. Both these extremes, however, eventually level off. The symptoms may be intense for two or three days, but within 10 to 14 days after quitting, most subside. The truth is that after people quit smoking, they have more energy, they generally will need less sleep, and feel better about themselves.

Quitting smoking not only extends ex-smoker's life, but adds new happiness and meaning to one's current life. Most smokers state that immediately after they quit smoking, they start noticing dramatic differences in their overall health and vitality.

Quitting is beneficial at any age, no matter how long a person has been smoking. The mortality ratio of ex-smoker decreases after quitting. If patient quits before a serious disease has developed, his body may eventually be able to restore itself almost completely.