When nearly all animals use fat as their primary source of fuel, why do dietary guidelines advise a diet based on carbohydrates for human beings?

Question

Apparently even cows, who eat grass, synthesize fats in their rumen. I could be wrong. Looking for some clarity on this subject. Thanks!

In: Biology

Answer 1

I think you’ve misunderstood something because most animals use carbs as their primary source of energy. Livestock is fed mostly grass and grains which are carbs. Fats are good sources of energy but they’ve become so abundant in modern society that they’re discouraged because it’s easy to exceed your energy needs and excess fat in your circulation is what leads to heart disease. Humans need more carbs than most because of our big brains take a ton of energy to run and it primarily uses carbs as an energy source