Must-Know Facts About Amino Acids And Their Functions For Kids

Anamika Balouria
Oct 05, 2022 By Anamika Balouria
Originally Published on Mar 04, 2022
Edited by Lara Simpson
Fact-checked by Pradhanya Rao
Read facts about amino acids to know about essential amino acids, their function, and more.
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Age: 3-18
Read time: 7.6 Min

The amino group is commonly related to proteins and associated with the peptide bond.

Protein synthesis involves essential amino acids along with nonessential amino acids. Amino acids can be found in both animal proteins and plant proteins.

Natural amino acids are organic compounds containing both the amino group (-NH2) and the carboxylic acid group (-COOH) attached to the same carbon atom. They differ from non-natural ('synthetic') amino acids, which carry only one of these functionalities on the same carbon atom.

Natural amino acids are found in nature and form the basic structure of proteins. Amino acids have a moisturizing effect on the skin. They are better soluble in water than in oil or fat, and thus they can be used to hydrate dry skin.

At the same time, amino acids have a thickening effect on the skin due to their viscosity. Amino acid supplements are generally considered very safe in small amounts.

The most common side effects of amino acid supplements are gastrointestinal upsets, such as nausea and diarrhea. The proper absorption of proteins helps with different functions such as tissue repair, muscle coordination with the help of muscle growth, wound healing, and many other medical conditions. It also aids in fat metabolism.

Meaning Of Amino Acids

An amino acid is an organic compound that contains the amine group, a carboxylic acid group, and a side chain.

Amino acids are the fundamental building blocks of protein. The 20 amino acids represent the building blocks for all life on Earth, and this linkage to living things gives each amino acid its biological specificity.

Each amino acid has a unique side-chain that reflects its chemical properties and reactivity. They are linked together to form a long chain by peptide bonds and folded into specific shapes inside the protein's three-dimensional space (tertiary structure).

Amino acid food is any food that contains amino acids, the building blocks of proteins and muscle tissue. These can be found in protein-rich foods, including red meat, eggs, and dairy products, and can also be found in some vegetables, such as spinach and broccoli.

Amino acids must be ingested since the body cannot synthesize them. Amino acids with polar R groups: hydrophilic acids contain a charged or polar group.

This allows for hydrogen bonding between different amino acids. The presence of a free hydrogen atom might render the amino acid 'reactive.'

The molecule containing a free primary amine is referred to as an 'amine.' The neutralized form of an acidic or basic amino acid may be called a zwitterion. The gene expression of these is no doubt essential for the body.

Types Of Amino Acids

There are many types of amino acids, but most of them fall into the categories of essential amino acids, nonessential amino acids, and conditional amino acids.

Essential amino acids are such that the body cannot synthesize them on its own and, therefore, they must be obtained from dietary sources. They include phenylalanine, threonine, valine, lysine, tryptophan, leucine, methionine, isoleucine, histidine.

Nonessential amino acids are amino acids that the body can produce on its own from other compounds in the body or various foods. They include alanine, arginine, aspartic acid, cysteine, glutamic acid, glycine, proline, serine, and tyrosine.

The body makes necessary amino acids from essential amino acids or the normal breakdown of proteins during digestion. Their production is not dependent on the intake of protein through food.

Conditionally essential amino acids are usually the nonessential amino acids that are in increased demand by the body during periods of stress or illness. They include glutamine and arginine. This means they may not be considered essential in certain circumstances under different conditions but would be under others.

The key elements of an amino acid are carbon (C), hydrogen (H), oxygen (O), and nitrogen (N), and a peptide is a short polymer formed from amino acid monomers linked by peptide bonds. The sequence of amino acids in a peptide is defined by the gene sequence, which is encoded in the genetic code.

Proteinogenic (or protein-building) amino acids are amino acids that are incorporated biosynthetically into a protein or polypeptide in a step called translation. All organisms use 20 standard amino acids as the building blocks for proteins. The other amino acids may be non-proteinogenic, meaning they have a different metabolic origin or display properties outside the range considered essential for life.

There are a few types of amino acids that we cannot produce in sufficient quantities.

Functions Of Amino Acids In The Human Body

When most people hear the word amino acids, images of high-performance athletes and bodybuilders come to mind.

It is an essential part of muscle building. However, not enough people understand how vital amino acids are when maintaining a healthy lifestyle. Amino acids have been around since there were cells instead of single-celled organisms. They play several roles that affect both our structural health and hormone balance.

Amino acids can be found in several foods, but most people taking supplements to boost their levels do so because they have entered a state called ketosis. When you go into ketosis, your body utilizes fat instead of carbohydrates for fuel.

It needs these essential amino acids as an energy source instead of sugar, which is what the body would usually use.

Too low of protein intake during this time can slow down or stop weight loss if not consumed enough to replace those being used up by the body. In many cases, supplementing with amino acids has been shown to help speed up metabolism and improve lipid profiles, both things that help keep heart disease at bay.

Amino acids are also used to make neurotransmitters, which help transmit signals between your brain cells.

While the human body can produce many amino acids on its own, some cannot be synthesized and must instead be taken in through diet or supplements. Leucine is an essential amino acid and part of life for all people whose bodies cannot produce it naturally.

This essential amino acid helps build and repair damaged tissue, improves insulin resistance, and stabilizes blood sugar levels.

Leucine deficiency leads directly to diabetes type 2 and several other life-threatening conditions. Branched-chain amino acids (BCAAs), such as leucine, help build muscles by providing protein which the body can use to repair and rebuild tissue. In addition to leucine, isoleucine and valine are two other amino acids that have potent effects on our overall health.

Amino Acid Deficiency In The Body

A variety of deficiencies in any amino acids can have various adverse effects on health, including decreased immunity, digestive issues, depression, fertility problems, slowed growth in children, and a slew of other illnesses.

The body's essential amino acids have their own functions. The lack of amino acids leads to the inhibition of the synthesis process of proteins.

The body can make amino acids, but some cannot be synthesized at all by our organism, and therefore, these must be supplied with food or dietary supplements. According to scientific research, around 20 amino acids are essential for humans.

This number decreases to 10 if we consider essential amino acids only from the perspective of children. Each amino acid is important for a specific process in our body. Some are essential for a shorter period, while others remain vital throughout life. The human body requires a certain number of amino acids to function correctly.

It cannot create some of them in sufficient quantities, so an external supply of food or dietary supplements is required in this case. The amount required differs from person to person, depending on age and lifestyle factors.

Our bodies can synthesize most amino acids. Some of them can be formed even by adults in the amount necessary for their own body's use only.

Importance Of Amino Acids

Amino acids are the building blocks of protein, responsible for almost every function in your body.

They're not only needed for cell growth and repair, but amino acids allow all the enzymes that regulate chemical reactions to do their job. Your body will be unable to build new proteins required for every function in the body. Amino acids are needed for your muscles, organs, skin, and more.

When you're deficient in amino acids, not only will it make you feel miserable, but it can also lead to long-term health problems. A lack of amino acids is one of the most pressing issues related to malnutrition. A high-protein diet may be harmful to people with kidney disease.

The need for amino acids increases during illness or injury due to the stress that it puts your body under. When recovering, muscles become catabolized, which means they're broken down, and amino acids are needed to form new proteins.

So a high protein diet may be beneficial for certain people. Still, not everyone, particularly those who have compromised kidney function, and it should be noted that this is not a blanket recommendation.

Your body can't produce nine of the essential amino acids, so you need to obtain them from your diet. All nine of the essential amino acids are found plentifully in meats, fish, eggs, dairy products, soy, and quinoa; however, vegetarians and vegans will need to pay closer attention to getting enough of the essential amino acids.

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Sources

https://www.healthline.com/nutrition/essential-amino-acids

https://www.medicalnewstoday.com/articles/324229

https://www.ajinomoto.com/aboutus/amino-acids/amino-acid-faq

https://www.britannica.com/science/amino-acid

https://kids.kiddle.co/Amino_acid

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Written by Anamika Balouria

Bachelor of Arts specializing in English, Bachelor of Education specializing in Secondary Education and Teaching, Master of Arts specializing in English

Anamika Balouria picture

Anamika BalouriaBachelor of Arts specializing in English, Bachelor of Education specializing in Secondary Education and Teaching, Master of Arts specializing in English

A dedicated and enthusiastic learner, Anamika is committed to the growth and development of her team and organization. She holds undergraduate and postgraduate degrees in English from Daulat Ram University and Indira Gandhi Institute for Open Learning respectively, as well as a Bachelor of Education from Amity University, Noida. Anamika is a skilled writer and editor with a passion for continual learning and development.
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Fact-checked by Pradhanya Rao

Bachelor of Commerce specializing in Marketing and HR

Pradhanya Rao picture

Pradhanya RaoBachelor of Commerce specializing in Marketing and HR

With a Bachelor’s degree in Commerce from Christ University, Bangalore, Pradhanya's passion for the English language and literature led her to explore the field of content writing, where she has gained extensive experience in writing, reviewing, editing, and fact-checking. She has also earned certifications in Google Ads Search, Google Ads Display, and Social Media Marketing, showcasing her proficiency in digital marketing.

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