Public health experts have waged a long-standing educational campaign to get people to eat more vegetables, which are known to help prevent cancer  Unfortunately, the campaign has had little impact on people' s diets  The reason is probably that many people simply dislike the taste of most vegetables
Thus, the campaign would probably be more effective if it included information on ways to make vegetables more appetizing
People who find a few vegetables appetizing typically do not eat substantially more vegetables than do people who dislike the taste of most vegetables.