Share of fat and protein in LC diets

 https://www.mercurynews.com/2017/09/06/buck-institute-study-suggests-high-fat-diet-may-be-healthy/?fbclid=IwAR2IPDONVAxuEtDgT_2m0ZcJ2riNEgLa-7nTeBzY-0C0kKGmKGmnvWDGvO0

One hot topic in LC diets is the issue of the share of fat and protein.

Ok <50 g/D of carbs but how much fat and how much protein?