What’s up ? This is THE stephane ANDRE. With my training, I’m interested in nutrition to stay in shape. I read some advices from Arnold Schwarzenegger and I learned some good stuff.
Your body uses protein to build, repair and maintain muscle tissue. Bodybuilders have a great knowledge of nutrition, especially the protein for building muscle. Since they want to consume much more muscle than the average person, they consume more protein than average.
Your body uses protein to build muscle only if all the necessary amino acids are available. The small problem is that your body doesn’t produce by itself all the necessary amino acids. Amino acids that your body can’t produce are called essential amino acids and fortunately they’re available in foods.
Proteins are made of carbon, hydrogen and oxygen like other macronutrients, but proteins have one more element, nitrogen. Bodybuilders often explain that they have a positive or negative nitrogen balance, which means that they’re in an anabolic state (muscle gain) or in a catabolic state (loss of muscle).
Food and protein
There are foods called complete proteins, which means that they provide all the amino acids needed to create usable proteins. Milk, eggs, meat, fish and many vegetable products have complete proteins. Be careful because these foods don’t have the same amount of usable protein by weight. For example a food that contains 10 grams of protein, your body can use only 7 grams.
Here is a table that shows the amount of protein by weight and the protein’s amount used in your body as a percentage for the most common foods :
|Food||% Protein by weight||% Net Protein Utilization|
|Meat and flowl||19-31||68|
(Whey is a byproduct of milk that contain much more protein than eggs)
This table tells us that an egg contains only 12% protein by weight. Despite this small percentage, an egg contains an amino acids balance that allows your body to use 94% of it. However, the table tells us that soy flour contains 42% protein by weight. But because of the amino acids composition, your body can use only 61%. This shows us that there is a difference between the protein’s amount in a food and the protein’s amount your body can use.
This is the end of Part 1.In Part 2, I show you that in cases where you don’t have complete protein foods, it’s possible to make combination of food to have the maximum protein used by your body.
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