The difference here from malaria would be that our bodies evolved, adapting to the nutrients that we were getting. We're more efficient on them -- more capable

The difference here from malaria would be that our bodies evolved, adapting to the nutrients that we were getting. We're more efficient on them -- more capable of living 'natural' lives. [Of course, whether a 'natural' life is desirable is debatable.] Malaria, however, we attempted to evolve away from(sickle cell anemia).