Lesson 7. What is the Food We Eat?

http://www.economist.com/node/15865260

doubting the widespread notion of the cancer protective function of fruits and vegetables. Answer the following questions:

1. Which facts do the studies into the “virtues” of fruits and vegetables rely upon?

2. Why do such investigations seem doubtful and biased?

3. What approach differs the cohort study from the previous ones?

4. What do the results of the research state?

5. What is the correlation between cancer risks and eating fruits and vegs regularly?