Nutrient Density

[BrownEye]

In contrast, if we were going to get all of our protein from spinach we would need to eat 60 cups of spinach in a day.

Are you talking about a cup of loose spinach, or a cup of solid mass? Almonds are larger solids while spinach is thin and loosely layered. A huge difference between fitting a full bundle of spinach in the cup to match the solid of a nut as compared to just dropping loose tossed spinach in the cup, which will be mostly air.

I have been finding that the human body takes in way more than what scientific needs claim. B12 is the best example in my case. The optimal supplementation for me at 175lbs is a single tablet a year. That is, IF I wanted to supplement. That example will change when I move to another part of the planet and possibly not worrying about "sterility" of the food I eat.