JeepWrangler

First, 1g/lbs protein is broscience. You're right, 0.75g/lbs is suffice. In fact, overkill of protein increases IGF-1 levels and increases your risk of cancer. http://www.cell.com/cell-metabolism/abstract/S1550-4131(14)00062-X Now, the whole "usable protein" thing only applies if your diet is extremely limited, meaning you're getting your calories ONLY from peanut butter, or beans, etc. If you're eating a diet with variety, it's fine. One example is beans and rice. Beans have a high amount of certain types of amino acids, but extremely low in other types of amino acids. Rice makes up for the low amino acids in beans. Here's a PDF that shows you what the limiting amino acids are in certain foods, and what to pair them with: http://www.savvyvegetarian.com/articles/plant-food-protein-chart.pdf By the way, you DON'T have to eat the complimentary foods together in the same meal.