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9 Reasons why Protein is Crucial to your Health

9 Reasons why Protein is Crucial to your Health
July 15, 2020AGNES JOSEPHNews

Protein is crucial to good health. In fact, the name comes from the Greek word proteos, meaning “primary” or “first place.”

Proteins are made up of amino acids that join together to form long chains. You can think of a protein as a string of beads in which each bead is an amino acid. There are 20 amino acids that help form the thousands of different proteins in your body.

Proteins do most of their work in the cell and perform various jobs.

Here are 9 important functions of protein in your body.

1. Growth and Maintenance

Your body needs protein for growth and maintenance of tissues. Yet, your body’s proteins are in a constant state of turnover.

Under normal circumstances, your body breaks down the same amount of protein that it uses to build and repair tissues. Other times, it breaks down more protein than it can create, thus increasing your body’s needs.

This typically happens in periods of illness, during pregnancy and while breastfeeding. People recovering from an injury or surgery, older adults and athletes require more protein as well.

Protein is required for the growth and maintenance of tissues. Your body’s protein needs are dependent upon your health and activity level.

2. Causes Biochemical Reactions

Enzymes are proteins that aid the thousands of biochemical reactions that take place within and outside of your cells.

The structure of enzymes allows them to combine with other molecules inside the cell called substrates, which catalyze reactions that are essential to your metabolism.

Enzymes may also function outside the cell, such as digestive enzymes like lactase and sucrase, which help digest sugar. Some enzymes require other molecules, such as vitamins or minerals, for a reaction to take place.

Bodily functions that depend on enzymes include:

  • Digestion
  • Energy production
  • Blood clotting
  • Muscle contraction

Lack or improper function of these enzymes can result in disease.

Enzymes are proteins that allow key chemical reactions to take place within your body.

3. Acts as a Messenger

Some proteins are hormones, which are chemical messengers that aid communication between your cells, tissues and organs.

They’re made and secreted by endocrine tissues or glands and then transported in your blood to their target tissues or organs where they bind to protein receptors on the cell surface.

Hormones can be grouped into three main categories:

  • Protein and peptides: These are made from chains of amino acids, ranging from a few to several hundred.
  • Steroids: These are made from the fat cholesterol. The sex hormones, testosterone and estrogen, are steroid-based.
  • Amines: These are made from the individual amino acids tryptophan or tyrosine, which help make hormones related to sleep and metabolism.

Protein and polypeptides make up most of your body’s hormones.

Some examples include:

  • Insulin: Signals the uptake of glucose or sugar into the cell.
  • Glucagon: Signals the breakdown of stored glucose in the liver.
  • hGH (human growth hormone): Stimulates the growth of various tissues, including bone.
  • ADH (antidiuretic hormone): Signals the kidneys to reabsorb water.
  • ACTH (adrenocorticotropic hormone): Stimulates the release of cortisol, a key factor in metabolism.

Amino acid chains of various lengths form protein and peptides, which make up several of your body’s hormones and transmit information between your cells, tissues and organs.

4. Provides Structure

Some proteins are fibrous and provide cells and tissues with stiffness and rigidity.

These proteins include keratin, collagen and elastin, which help form the connective framework of certain structures in your body. Keratin is a structural protein that is found in your skin, hair and nails.

Collagen is the most abundant protein in your body and is the structural protein of your bones, tendons, ligaments and skin.

Elastin is several hundred times more flexible than collagen. Its high elasticity allows many tissues in your body to return to their original shape after stretching or contracting, such as your uterus, lungs and arteries.

A class of proteins known as fibrous proteins provide various parts of your body with structure, strength and elasticity.

5. Maintains Proper pH

Protein plays a vital role in regulating the concentrations of acids and bases in your blood and other bodily fluids.

The balance between acids and bases is measured using the pH scale. It ranges from 0 to 14, with 0 being the most acidic, 7 neutral and 14 the most alkaline.

Examples of the pH value of common substances include:

  • pH 2: Stomach acid
  • pH 4: Tomato juice
  • pH 5: Black coffee
  • pH 7.4: Human blood
  • pH 10: Milk of magnesia
  • pH 12: Soapy water

A variety of buffering systems allows your bodily fluids to maintain normal pH ranges.

A constant pH is necessary, as even a slight change in pH can be harmful or potentially deadly. One way your body regulates pH is with proteins. An example is hemoglobin, a protein that makes up red blood cells.

Hemoglobin binds small amounts of acid, helping to maintain the normal pH value of your blood.

The other buffer systems in your body include phosphate and bicarbonate.

Proteins act as a buffer system, helping your body maintain proper pH values of the blood and other bodily fluids.

6. Balances Fluids

Proteins regulate body processes to maintain fluid balance.A lbumin and globulin are proteins in your blood that help maintain your body’s fluid balance by attracting and retaining water.

If you don’t eat enough protein, your levels of albumin and globulin eventually decrease. Consequently, these proteins can no longer keep blood in your blood vessels, and the fluid is forced into the spaces between your cells.

As the fluid continues to build up in the spaces between your cells, swelling or edema occurs, particularly in the stomach region.

This is a form of severe protein malnutrition called kwashiorkor that develops when a person is consuming enough calories but does not consume enough protein.

Kwashiorkor is rare in developed regions of the world and occurs more often in areas of starvation.

Proteins in your blood maintain the fluid balance between your blood and the surrounding tissues.

7. Bolsters Immune Health

Proteins help form immunoglobulins, or antibodies, to fight infection. Antibodies are proteins in your blood that help protect your body from harmful invaders like bacteria and viruses.

When these foreign invaders enter your cells, your body produces antibodies that tag them for elimination. Without these antibodies, bacteria and viruses would be free to multiply and overwhelm your body with the disease they cause.

Once your body has produced antibodies against a particular bacteria or virus, your cells never forget how to make them.

This allows the antibodies to respond quickly the next time a particular disease agent invades your body. As a result, your body develops immunity against the diseases to which it is exposed.

Proteins form antibodies to protect your body from foreign invaders, such as disease-causing bacteria and viruses.

8. Transports and Stores Nutrients

Transport proteins carry substances throughout your bloodstream — into cells, out of cells or within cells. The substances transported by these proteins include nutrients like vitamins or minerals, blood sugar, cholesterol and oxygen.

For example, hemoglobin is a protein that carries oxygen from your lungs to body tissues. Glucose transporters (GLUT) move glucose to your cells, while lipoproteins transport cholesterol and other fats in your blood.

Protein transporters are specific, meaning they will only bind to specific substances. In other words, a protein transporter that moves glucose will not move cholesterol.

Proteins also have storage roles. Ferritin is a storage protein that stores iron. Another storage protein is casein, which is the principal protein in milk that helps babies grow.

Some proteins transport nutrients throughout your entire body, while others store them.

9. Provides Energy

Proteins can supply your body with energy. Protein contains four calories per gram, the same amount of energy that carbs provide. Fats supply the most energy, at nine calories per gram.

However, the last thing your body wants to use for energy is protein since this valuable nutrient is widely used throughout your body.

Carbs and fats are much better suited for providing energy, as your body maintains reserves for use as fuel. Moreover, they’re metabolized more efficiently compared to protein.

In fact, protein supplies your body with very little of its energy needs under normal circumstances. However, in a state of fasting (18–48 hours of no food intake), your body breaks down skeletal muscle so that the amino acids can supply you with energy.

Your body also uses amino acids from broken-down skeletal muscle if carbohydrate storage is low. This can occur after exhaustive exercise or if you don’t consume enough calories in general.

Protein can serve as a valuable energy source but only in situations of fasting, exhaustive exercise or inadequate calorie intake.

In Conclusion,

Protein has many roles in your body.

It helps repair and build your body’s tissues, allows metabolic reactions to take place and coordinates bodily functions. In addition to providing your body with a structural framework, proteins also maintain proper pH and fluid balance.

Finally, they keep your immune system strong, transport and store nutrients and can act as an energy source, if needed.

Collectively, these functions make protein one of the most important nutrients for your health.

Source: healthline.com

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