This is a remnant from our hunter-gatherer days. Back then, food was scarce. So our bodies had to be able to turn protein into glucose to make energy from whatever food we ate. But today, food is abundant, and most of us don’t need the extra glucose.
Since we are less active than our ancestors… and since we live longer than they did… we need less glucose and more protein.
How much protein do we get from our food? Well, the amount varies from food to food. Some foods give us more protein than others. We know this because scientists have figured out how to measure it.
Scientists know that amino acids contain nitrogen. When amino acids are made into proteins, the nitrogen becomes part of the proteins, and remains in your body. But when amino acids are turned into sugar, the nitrogen is released and excreted in your urine.
So if you want to know how much amino acids in a food are made into proteins, simply measure the amount of nitrogen in your urine.
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