Plus ¨servants, slaves, prisoners, or people who simply regularly don't have enough to eat¨ were/are all enduring stressful lifestyles, deprived of basic needs and enjoyment that surely lead to a shortened lifespan regardless of what they eat or did not eat -rendering any nutritional benefit (doubtful, due to the lack of control over one's diet patterns and contents) irrelevant in their cases-. One cannot consider a complex system like the human body without taking into account all major factors involved in its dynamics.