The blood can absorb carbon monoxide 200 times as fast as oxygen so a lot of the oxygen is displaced by carbon monoxide. The organs including the skin are starved of life giving oxygen and slowly poisoned by the carbon monoxide.
But that’s not the end of it. Cigarette smoke also contains the following deadly cocktail of chemicals.
Ammonia, hydrogen cyanide, butane, nicotine, carbolic acid, collidine, formic aldehyde, lutidine, parvoline, prussic acid, pyridine, arsenic and cadmium. This list is by no means complete.
The affect on the skin of all these is catastrophic. The liver goes into overdrive trying to expel these chemicals from the body and cannot perform its normal functions properly. The skin loses its healthy glow and takes on a yellowish-grey cast.