Basically if someone had enough calories(but from mostly from carbohydrates and saturated fat only, with a little protein), why would they still feel hungry? I know lacking adequate protein and fats can lead to health problems but my question is more about why the body would still by hungry despite this diet e.g. Does the body need an minimun amount of calories from protein?
As an example. Lets say someone needs 1500 callories to maintain body weight/energy. They live only on some chocolate biscuits. The nutrition for the chocolate biscuit is as follows and they eat 16 buscuits per day:
1 biscuit/16 per day
calories 116 /(so*16)= 1856 calories per day.
saturated fat 6.0g /(so*16)= 48g fat per day.
Carbohydrate 14g/(so*16) = 224g
of which sugars 9g/(so*16) = 114g
protein 1.3g/(so *16) = 10.4
Note that the diet has no polyunsuturated fats or monosaturated fats. As you can see it exceed the 1500 calories required, uses both carbohydrate and saturated fat and only has 10.4g protein.
I know this diet would cause helth problems however that is not my question. My questions is: Why would the body still be hungry despite well exceeding the calories required? Is it because the body needs a minimum amount of protein(more than 10.4g), the body needs a minimum amount of polyunstaturaed/monosaturated fats etc? What is the reason?