Why is loss of appetite a symptom of illness, if you need energy to recover?
In: Biology
Digestion used energy and is not an “essential” function. You need food obviously but digestion can shut down for weeks and you’d still survive. It’s not essential like circulation, respiration, immune response etc.
In fact, you could in theory get most of your food intravenously and not need these organs. The body would rather divert all focus into fighting invaders than digesting food, especially if said food could introduce more pathogens. If you’ve been well fed and of good health, you likely have large enough energy reserves to fight most invaders
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