In people who practice energy restriction to prolong life, hunger becomes persistent when kcal intake first drops by what percentage?
a. 10
b. 20
c. 30
d. 40
e. 50
Question 2
People who persistently restrict energy intake by 30 for 30 years can expect to increase longevity by up to how many years?
a. 3
b. 6
c. 9
d. 12
e. 15