Printer Friendly

Vegetables may reduce risk of lung cancer in smokers.

Vegetables May Reduce Risk of Lung Cancer in Smokers

Eating a variety of vegetables may decrease the risk of developing lung cancer, a recent cross-cultural study in Hawaii suggests.

According to Lois Le Marchand and colleagues from the Epidemiology Program at the University of Hawaii, the findings of a 1983-1985 population-based study lend support to previous claims about beta-carotene's protective role against lung cancer. The investigators further concluded that all vegetables, not just those rich in beta-carotene, showed a dose-dependent negative association with the disease.

The risk of developing lung cancer, in both males and females, was inversely related to the amount of vegetables consumed. After adjustments for smoking, men with the lowest total vegetable intake had nearly three times the risk of developing lung cancer, while women in the same category had seven times the risk.

Study participants included 332 lung cancer patients and 865 controls from the island of Oahu. In order to ascertain the frequency and quantity of vegetable consumption, researchers administered dietary questionnaires to all subjects, and then classified the food groups on the basis of micronutrient content. Among vitamin A components, only consumption of beta-carotene and the other carotenoids with vitamin A activity was linked to cancer risk; beta-carotene showed a protective role.

Its protective mechanism was strongest for male smokers, particularly for current and recent ex-smokers, whereas for women, only ex-smokers and those who had never smoked showed this protective effect.

Of note, however, the researchers found that the reduction of lung cancer risk is greater for overall vegetable consumption than with beta-carotene intake per se. In addition, they reported that "the study provides indirect evidence for a protective effect against lung cancer from the consumption of lycopene, lutein, and the cancer inhibitors particularly abundant in cruciferous vegetables." (Journal of the National Cancer Institute August 2, 1989; 81:1158-64.)
COPYRIGHT 1989 Vegetus Publications
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1989 Gale, Cengage Learning. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Publication:Nutrition Health Review
Date:Sep 22, 1989
Previous Article:Cervical cancer rates higher among users of the pill.
Next Article:Full moon not linked to behavior.

Related Articles
More veggies join fight against lung cancer.
A dietary shield against lung cancer?
Saturated fats may foster lung cancer.
Antioxidants: surprise, surprise.
Cancer prevention research conference reports protective effect of cruciferous vegetables.
Broccoli may cut lung cancer risk in smokers.
Broccoli may cut lung cancer risk in smokers.
Long-term use of nutrient supplements 'ups cancer risk'.

Terms of use | Copyright © 2016 Farlex, Inc. | Feedback | For webmasters