Smokers - Eat more fresh tomato if not ketchup
Though I am not a chain smoker here is a health brief for smokers at large.
Tomatoes may help protect smokers against lung disease, new research on mice suggests.
Japanese scientists found that mixing tomato juice into the animals' drinking water completely prevented them suffering emphysema triggered by tobacco smoke.
Emphysema is predominantly a smokers' condition which prevents the lungs working properly, resulting in breathlessness and wheezing.
Together with chronic bronchitis it is one of the chief causes of chronic obstructive pulmonary disease, or COPD, which kills about 28,000 people each year in the UK.
Emphysema damages the elastic supporting structure of the lungs, leading to the breakdown and collapse of airways.
Scientists in Japan made the tomato discovery while searching for a good animal model for studying the effects of smoking.
One strain of mice with lungs that aged faster than normal developed emphysema after being exposed to tobacco smoke for eight weeks.
When the animals' regular water supply was replaced with 50% tomato juice, it prevented them getting the disease.
Tomato juice was given to the mice because it contains a powerful natural antioxidant, lycopene, which is already known to benefit health.
Lycopene has been associated with a reduced risk of prostate cancer in men. Tobacco smoke injures the lungs through oxidative stress, chemical damage caused by dangerous groups of atoms called free radicals.
Antioxidants, such as lycopene, prevent this happening. Kuniaki Seyama, one of the scientists from the Juntendo University School of Medicine in Tokyo, said: ''Using our mouse model for smoke-induced emphysema, we wanted to intervene in the accumulation process by changing daily lifestyle, especially eating habits. We thought lycopene might be a good candidate.''
The findings were published today in the American Journal of Physiology.
The scientists said although they believed lycopene was responsible for the protective effect, other ingredients in tomato juice may also have been involved.
They now want to test tomato juice on human patients with COPD.