Smoking is the most preventable cause of ill health that we know, and every effort should be made to stop this destructive habit. Some people find it extremely difficult to stop this addiction, and clinicians are faced with the dilemma that they may have to opt for the second-best option by limiting the damage done by cigarette smoke inhalation. Since smoking initiates powerful oxidative processes in the human body, research concentrated on limiting oxidative stress by adding antioxidant vitamins to the diet.