But what did evolution do for the starving humans? Appearing around 2 Ma ago, Homo erectus, as our actual and direct ancestor, showed remarkable adaptations to its changed habitat. His bipedal gait, particular stature, and metabolism enabled him to run longer than any other mammal. Hunting larger animals was a specific advantage. The hunger that drove him to hunt was a hunger for energy. The hunger metabolism is set up so that the brain is supplied with energy. The selfish brain can absorb energy-supplying nutrients (fats, carbohydrates) and withhold them from other organs. Are we hungry for micronutrients? It seems that micronutrients can also regulate food intake and that deficits in individual micronutrients affect the amount of food consumed. Modern humans “play” with hunger by intermittent fasting or caloric restriction—the promise: more extended life expectancy. If this does not reduce food quality, it is not unhealthy. However, it is questionable whether the scientific hypotheses describing life’s lengthening happen.