Proteins may be derived by different sources: those easy to digest are from milk and vegetables.The name of an organic or nutritional component itself may already help in understanding its function. The etymology of the word protein originates from the Greek proteinos (from protos) meaning primary. From a chemical standpoint, protein substances are quaternary, made up of 4 elements (carbon, hydrogen, oxygen, and nitrogen); this contrasts with fats and carbohydrates (made of tertiary substances). It’s easy to understand why, if the need arises, the body can produce a tertiary substance from a quaternary. Producing a quaternary substance from a tertiary is impossible (missing nitrogen). During any muscular activity, we are “stressing” our muscle structures that are alive and continuously renewing themselves. If the need arises these structures may also be increased (not only for athletes but also for young ones during their growth and pregnant women). Proteins are extremely useful and nourishing. Despite common beliefs, researchers have found that the best protein intake (1.2/1.4g for Kg) is fundamental for counteracting common oncologic and cardiovascular illnesses by supporting muscle tone recovery and maintenance. Proteins are composed of amino acids (like wall bricks). The body cannot produce these (essential) amino acids, which is why we are forced to assimilate them through food.
ANIMAL AND PLANT PROTEINS
Animal proteins include all essential amino acids; plant proteins are lacking some of them (read also “Plant origin proteins”). Because of personal preference some may choose to become vegan (a diet free from animal proteins); these choices are reasonable, and perfectly sustainable even for athletes. The main rule is to mix diverse types of vegetal protein to balance the amino acid intake compensating for any deficiency (for example, several types of cereals and legumes). Apart from quality, it’s also important to consider the quantities. Protein intake is usually measured in grams in relation to the person’s weight. The best protein intake may start from 0.7/1g for a woman or man with a sedentary lifestyle and may be increased up to 1.7/2.2g for women or men athletes. Obviously, those who choose to become vegetarians may have difficulties in fully reaching their ideal protein intake especially because when eating the body receives not only proteins but also an abundance of carbohydrates and fats that come along with them. That is why diet supplements for vegans have been produced. It’s important to find perfectly balanced products that help provide all essential amino acids needed (for example soy, rice, and peas) having an 80% protein concentration.|
Proteins
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Fats
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Calories
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Carbohydrates
|
|
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100 gr meat
|
20 g
|
4/6 g
|
120/140 Kcal
|
1g
|
|
22/23 gr supplements
|
20 g
|
0g
|
85/90 Kcal
|
1g
|
|
100 gr fagioli
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20 g
|
0,5 g
|
330 Kcal
|
63 g
|