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methionine, phenylalanine, threonine, tryptophan, and valine are the essential amino acids that
are not made by the body (there are two others necessary for infants and small children). We
get these amino acids when we consume proteins like meat, fish, poultry and legumes. Protein
sources that contain adequate amounts of all of the amino acids are called ‘complete proteins’.
Those food items that do not contain all or adequate amounts of amino acids are known as
‘incomplete proteins’.
In general, animal proteins (meat, fish, poultry, cheese, eggs) are considered ‘complete proteins’.
The ‘incomplete proteins’ are those that are vegetable-based, usually in the form of grains,
legumes, nuts and seeds. To get enough essential amino acids through vegetable protein, one
usually has to combine several different food groups together in a strategic combination. Breaking
down and processing protein takes a lot more energy and much more time than it does to break
down other nutrients. In other words, the body has to work a lot harder to digest protein than it
does with carbohydrates and fat.
HOW DO PROTEINS METABOLIZE?
Breaking down and processing protein takes a lot more energy and much more time than it
does to break down other nutrients. The extra energy it takes to break down and process protein
reduces the amount of energy (calories) your body receives from the food it consumed. This
is good. Also, because it takes longer to break down and to assimilate protein, the process of
emptying the stomach takes longer as well, which causes us to feel full longer, which reduces
hunger pangs and increases the time we need before our next meal. Effectively, this results
in fewer meals (or at least fewer big meals) eaten each day and as a result, fewer calories
consumed. In other words, the body has to work a lot harder to digest protein than it does with
carbohydrates and fat in a meanwhile decreasing your appetite level
Our body uses only 50% of proteins we eat and rest of 50% are eliminated in the form of waste.
So, categorically, protein is not stored in your body as compared to fats and carbohydrates. So
when you eat calories primarily from protein, you can rest assured that these protein calories are
repairing and rebuilding your body with the excess being eliminated as waste. The extra protein
will not be stored as body fat. As you will see, this is in stark contrast to the excess carbohydrates
and fat we eat, which are stored in our bodies (in our fat cells) instead of being eliminated.
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