[superpermutat0r]

But minimum daily intake of fiber, for humans to remain healthy, is not zero.

Vegetables, especially if you eat them in amounts that sustain your weight, have enough omega essential fatty acids to last you a lifetime.

Legumes do have fat in them.

If you eat 2000kcal of red lentils, there's more than enough protein and fat content, almost meets your omega-3 essential fatty acid requirement. Nothing stops you from adding different fattier vegetables.

[nradov]

Humans can be healthy without fiber. For example, see the traditional Inuit diet (at least during winter).

[superpermutat0r]

Traditional Inuit diet was not healthy.

https://www.sciencedirect.com/science/article/abs/pii/S00219...

Here's a study on historical data, here are some statements: "Arteriosclerosis and degeneration of the myocardium are quite common conditions among the Greenlander" -- study from 1940

https://www.sciencedirect.com/science/article/abs/pii/002191...

IMO, best evidence ever is on Maasai people, where they find massive amounts of atherosclerosis in the blood vessels of young people and there are multiple cases where young people die of atherosclerosis. Only thing that makes Maasai survive is that they start with this kind of diet at early age, their blood vessels get extra wide and elastic and can withstand the hardening effects of atherosclerosis.

Fiberless diet is a death certificate for the modern western man if one's not on it from birth.