Effects of amino acids
The role of amino acids
1、Protein is digested and absorbed in the organism through amino acids:as the first nutritional element in the organism,the role of protein in food nutrition is obvious,but it is not directly utilised in the body,but is utilised by turning into small molecules of amino acids.
2,play a role in nitrogen balance:when the quality and quantity of protein in the daily diet is appropriate,the amount of nitrogen intake by the faeces,urine and skin excretion of nitrogen is equal,called the total balance of nitrogen.In fact,it is the balance between the constant synthesis and decomposition of protein and amino acids.The amount of protein consumed by a normal person should be kept within a certain range.When the amount of protein consumed is suddenly increased or decreased,the body can still regulate the amount of protein metabolised to maintain nitrogen balance.If you eat too much protein and exceed the body's ability to regulate it,the homeostatic mechanism will be disrupted.If the body does not eat protein at all,the body still decomposes tissue protein and continues to have a negative nitrogen balance,which will eventually lead to antibody death if no timely measures are taken to correct it.
3、Transformed into sugar or fat:a-keto acid produced by amino acid decomposition and metabolism,with different characteristics,according to the metabolic pathway of sugar or lipid metabolism.a-keto acid can be synthesized into new amino acids,or transformed into sugar or fat,or enter the tricarboxylic acid cycle oxidation decomposition into CO2 and H2O,and release energy.
4,involved in the composition of enzymes,hormones,some vitamins:the chemical nature of enzymes is protein(amino acid molecular composition),such as amylase,pepsin,cholinesterase,carbonic anhydrase,transaminase,etc..Nitrogenous hormones are composed of proteins or their derivatives,such as growth hormone,thyroid stimulating hormone,adrenaline,insulin,intestinal fluid stimulating hormone,etc.Some vitamins are transformed from amino acids or are present in combination with proteins.Enzymes,hormones and vitamins play a very important role in regulating physiological functions and catalysing metabolic processes.
5、Essential amino acid requirement:the requirement of essential amino acids for adults is about 20%of protein requirement,-37%.
Effectiveness of amino acids
Older people who lack protein in their bodies break down more and synthesis slows down. Therefore, generally speaking, the elderly need more protein than young adults, and the demand for methionine and lysine is also higher than that of young adults. 60 years old and above should consume about 70 grams of protein per day, and require protein containing a complete range of essential amino acids and the appropriate ratio, so that high-quality protein, prolong life.
2, amino acids in medicine is mainly used to prepare compound amino acid infusion, but also used as a therapeutic drug and for the synthesis of peptide drugs. At present, there are more than a hundred kinds of amino acids used as drugs, including 20 kinds of amino acids that constitute proteins and more than 100 kinds of amino acids that constitute non-proteins.
The combination of amino acids plays a very important role in modern intravenous nutrition infusion and the "elemental diet" therapy, which plays an active role in maintaining the nutrition of critically ill patients and saving their lives, and has become one of the indispensable medical products in modern medicine.
The amino acids glutamic acid, arginine, aspartic acid, cystine and L-dopa act alone in the treatment of a number of diseases, mainly liver diseases, digestive diseases, encephalopathies, cardiovascular diseases, respiratory diseases, as well as for improving muscle vitality, paediatric nutrition and detoxification. In addition amino acid derivatives are showing promise in the treatment of cancer.
In order to survive, humans must consume food to maintain the normal physiological, biochemical and immunological functions of antibodies, as well as growth and development, metabolism and other vital activities. The active ingredients in food are called nutrients.
Proteins, lipids, carbohydrates, inorganic salts (i.e. minerals, containing macronutrients and trace elements), vitamins, water and dietary fibre, which are the most basic substances that make up the human body, are also nutrients that the body needs. They have their own unique nutritional functions in the body, but are closely linked in the metabolic process and together participate in, promote and regulate life activities. The body is linked to the outside world through food to maintain the relative constancy of the internal environment and to complete the unification and balance of the internal and external environment.