What factors do medical anthropologists think we need to consider if we are to reduce the suffering in human life?

The best answer for this question would be:

biological and social

Medical anthropologist need to understand the source of their biological heritage and ofcourse the system of their bodies in order to understand their suffering. Social factor is also important, because it can tells them the source of their suffering.

Each gram of carbohydrates and proteins yield 4 calories / gram . the more the calories a food has the more energy it provide to you body.