What's your protein intake with that diet though? A person with 80kg needs around 120-160g of protein a day (depending on activity etc), that seems tricky if the source of your protein is non-animal based.
Does he need that much? I'm pretty sure 5-6 generations ago the most muscular and the strongest man in my region ate turnips and grains with the occasional meat. The only other big source of meat were beans and realistically people at the time didn't eat more then 50-70 grams a day of them.
Eating meat everyday is a very recent development. Why we suddenly need so much protein that we struggle to find it in a basic food that is more rich and varied then a few hundred years ago?
The current recommendation is in this region, yes. The bare minimum is 0.8g per kg. But that is survival mode.
I am generally not a huge fan of the historical line of thinking. 6 generations ago you died significantly earlier with not a great health along the way. It is a very recent development to live to (avg) 83. Would the strongest man in your region perform at a high level if he wasn't doing manual labour and died at 95?
