Yes. Fasting is a thing and there is some good science that indicates that it has benefits. The NYT has done some articles on this. The fast is normally for 24hours in those stories. It does not hurt to skip a meal. That isn't my objection to this episode. A tribe of hunters is portrayed going after food. It is stated that they have not eaten for several days. That the tribe will starve if they don't slap a dead animal onto a fire for their people. The role of women gathering plant based nutrition is ignored. To the point ; a woman is pictured at a grind stone processing seeds. That is food. This has been a constant theme in the study of Hunter/Gather societies. Emphasis is on the male role in these groups. Women probably provide the basic diet. Protein is important but it's not the only source of nutrition. In some societies protein distribution may be selective. Males get first dibs on the meat. Men hunt but they don't carry babies or lactate. In Children of Ash and Elm Neil Price points to evidence of malnutrition in females in Migration Age Scandinavian. A condition not present in males. First dibs to males in a society rich in seafood and farmed meat. They got my Anthropologist goat in this episode. And yes I have killed and eaten my own food. And gathered. I can even make the tools. That would be the real challenge.