Answer: 400-600 kcal
Explanation: in the question above, we have the following:
Caloric requirement per day = 2,000 kcal.
Percentage of caloric requirement from lipid sources = 20 - 30%
Amount of kcal from lipids will be calculated thus:
20% X 2,000 kcal
= 400 kcal
30% X 2,000 kcal
= 600 kcal
Therefore, 400 kcal to 600 kcal of the 2,000 kcal daily caloric requirement should come from lipids.