About 10% of calorie intake is the protein sweet spot. Incidentally about the average you would get from a divers whole foods plant based diet. Meat diets will struggle to get that low. In fact, the Norwegian government has stated that it would in fact recommend 10% because it would be the best nutritional advise, were it not for the fact that it would be hard to fit into the common meat based diets of Norwegians. I wish I could provide a source but have since been unable to locate the official document Were it was discussed.
