Most animals have a fairly simple diet, carnivores eat only meat their whole life, cows eat exclusively grass etc. So why are human bodies so picky and need a balance of protein, fat, carbs etc from different sources to perform well?
In: Biology
Your question includes a few common misconceptions, one that’s been addressed already.
Humans need a balanced diet, but that doesn’t necessarily imply a vast array of food types. That simply means the nutritional value of our food has to cover our needs.
It doesn’t have to be varied. You can very well thrive by eating the same handful of things every day.
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