https://goo.gl/PnCaLJ
Administration of 50 mg per day of vitamin E decreased the risk of pneumonia in elderly male smokers by 72% after theyquit smoking, according to a paper published in Clinical Interventions in Aging.
The age when the participant had started to smoke significantly modified the effect of vitamin E on pneumonia. Vitamin E decreased the risk of pneumonia by 35% in 7,469 participants who had started smoking at a later age, at 21 years or older, whereas the vitamin had no apparent effect on pneumonia for those who had started to smoke at a younger age.
Among the 7,469 participants who started to smoke at a later age, vitamin E supplementation reduced the incidence of pneumonia by 69% in a subgroup of 2,216 light smokers who exercised in their leisure time. In this subgroup, vitamin E prevented pneumonia in 12.9% of the participants by the time they reached the age of 74 years, which corresponds to one in eight getting a benefit from the vitamin. The vitamin did not have a significant effect on participants who smoked heavily or had not been taking exercise.