If you must inhale smoke you can protect yourself by cutting the cancer risk from smoking.

Make sure to take plenty of vitamins C & E.

Research has been found that vitamin C supplements given to smokers boost the staying power of Vitamin E,allowing it to better protect lung cells from damage.

Smokers given 1,000 milligrams of vitamin C a day slows the depletion of vitamin E by 50%. In fact the study showed that smokers who took vitamin C
supplements had almost the same levels of antioxidant protection as NON-smokers.

Vitamin E is one of the lungs first lines of defense against cigarette smoke and prevents the destruction of lung membranes,BUT in the process vitamin E loses effectiveness unless HIGH levels of vitamin C protect it.