** This test is called Amino Acid Utilization, or AAU. Let me show you how it works: If a protein food has an AAU of 100%, that means there is no nitrogen in your urine; 100% of the amino acids in the food are turned into proteins to rebuild your body. That’s great! On the other hand, if a protein food has an AAU of 10%, that means only 10% of the amino acids are turned into proteins. 90% are turned into sugar! That’s not good. Using the AAU test, scientists now know which foods are truly good sources of protein. And they found that the best one is breast milk, which has an AAU of 49%. Well, that makes sense, since babies need an efficient protein source. But we’re not babies, so what’s the next best protein source? It’s whole eggs, which have an AAU of 48%. But it has to be the whole egg. If you take out the yolks, you reduce the AAU to only 17%. Why? Because egg yolks are loaded with an essential amino acid called methionine. So next time you have eggs, make sure you eat them whole, not just the whites.

Date:   7/1/2022 1:17:33 AM ( 27 mon ago)

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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