There is a diet that claims that humans are natural frugivores and should eat 100% raw food for superior health ( they claim cooked food is unhealthy).

60% fruit
30% vegetables
10% nuts & seeds

is a good example

They claim it brings energy, better sleep, cure of diseases (diabetes, cancer, heart disease).

Is cooked food poisonous, toxic, unhealthy?

Don't monkeys, which are frugivores, eat all day? I don't think a diet is possible where you have to eat kilos of food everyday. What do you think?

Any extreme, whether in health, food and nutrition, or even exercise, is not good for the physical body. The same principal applies to Raw Food.
Acharya Shree