I've puzzled over this and generally agree with you. When I look at my menu the protein averages about 22% of intake but on a heavy activity day that'll be a lower % of expenditure. Their bottom line on protein is that most people get the right amount and we can generally trust our instincts when presented with a plate of meat.
Originally Posted by Neckhammer
IIRC the rationale is that their sample of centenarians eats around 12% protein. The safe range is 10~30% and each end has upsides and downsides. The theory is that high protein promotes growth and reproduction at the cost of longevity.
Lots of: urban hiking, cycling, sprinting
Lots of: fresh meat, seafood, eggs, organs, tubers, starch fruits, vegetables, meat fat, dairy fat, oil fruits
Some: cured meat, dairy protein, sweet fruits, rice, pulses, tree nuts, oil seeds
Minimal: soy, refined proteins, sugar, liquid carbohydrate, grains, refined oils, peanuts