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Hyaluronic Acid: The Science of Hydration

What is Hyaluronic Acid?

Hyaluronic Acid (HA), also known as hyaluronan or hyaluronate, is a carbohydrate – more specifically a mucopolysaccharide – occurring naturally throughout the human body. It can be several thousands of sugars (carbohydrates) long. When not bound to other molecules, Hyaluronic Acid binds to water, giving it a stiff viscous quality similar to Jello.

This viscous gel is one of the most heavily researched substances in medicine with thousands of trials. Most of the studies are in the fields of orthopedics and eye surgery. Its function in the body is, among other things, to bind water and to lubricate movable parts of the body, such as joints and muscles. Its consistency and tissue-friendliness allow it to be beneficial in skin care products as an excellent moisturizer.

Because Hyaluronic Acid is one of the most hydrophilic (water-loving) molecules in nature, with numerous benefits for the human body, it is described as “nature’s moisturizer.”


When was Hyaluronic Acid Discovered?

Hyaluronic Acid was first used commercially in 1942 when Endre Balazs applied for a patent to use it as a substitute for egg white in bakery products. Its discovery was very unique. No other molecule had ever been discovered that has such unique properties to the human body. Balazs went on to become the leading expert on HA, and made the majority of discoveries concerning Hyaluronic Acid benefits.

Hyaluronic Acid

Benefits for the Body?

If we compare the joints of the human body to an automobile engine, the joint fluid in the body mimics the oil in a car engine. At regular intervals, we replace the oil in our car engines because of the heat and friction breakdowns the oil’s viscosity.

The oil becomes thinner and less able to protect the metal surfaces from excessive wear. Hyaluronic acid benefits our joints in the same way. As we age, the viscosity of the joint fluid lessens. Hyaluronic Acid helps to maintain normal joint cushioning.


Where is Hyaluronic Acid Located in the body?

Hyaluronic Acid is found naturally in almost every cell in the body and occurs in high concentrations in specific body locations. In each body location, it serves a different function. Unfortunately, Hyaluronic Acid also has a half-life ( the time it takes for the molecule to get broken down and excreted from the body) of less than 3 days and possibly even as little as one day in the skin.

For this reason, it is imperative that the body continually replenish itself with HA. Below are some of the areas in the human body where it is present and critical to anatomical function.

Hyaluronic Acid in Bones and Cartilage

Hyaluronic Acid is found in all bones and cartilage throughout the body. Both of these provide a resilient rigidity to the structure of the human body. HA is found in various forms of cartilage, but none more than the hyaline cartilage.

As you may have guessed, hyaline is short for Hyaluronic Acid. Hyaline cartilage covers the ends of the long bones where articulation (bending) occurs and provides a cushioning effect for the bones. The hyaline cartilage has been called the “gristle cartilage” because of its resistance to wear and tear. Hyaline cartilage also supports the tip of the nose, connects the ribs to the sternum, and forms most of the larynx and supporting cartilage of the trachea and bronchial tubes in the lungs.

Hyaluronic Acid in Synovial Fluid

Our joints (like the elbows and knees) are surrounded by a membrane called the synovial membrane. This membrane forms a capsule around the ends of the two articulating bones. This membrane secretes a liquid called the synovial fluid. Synovial fluid is a viscous fluid with the consistency of motor oil.

It has many functions, but none more important than providing the elastic shock absorbing properties of the joint. Its second most important function in the joint is to carry nutrients to the cartilage and to also remove waste from the joint capsule.

Hyaluronic Acid in Tendons and Ligaments/Connective tissue

Connective tissue is found everywhere in the body. It does much more than connect body parts; it has many forms and functions. Its major functions include binding, support, protection, and insulation. One such example of connective tissue is the cordlike structures that connect muscle to bone (tendons) and bone to bone (ligaments). In all connective tissue, there are three structural elements. They are ground substance (Hyaluronic Acid), stretchy fibers (collagen and elastin) and a fundamental cell type.

Whereas all other primary tissues in the body are composed mainly of living cells, connective tissues are composed largely of a gel-like substance, Hyaluronic Acid, which separates and cushions the living cells of the connective tissue. The separation and cushioning allow the tissue to bear weight, withstand great tension and endure abuse that no other body tissue can. All of this is made possible because of the presence of Hyaluronic Acid and its ability to form the gelatinous fluid.

Hyaluronic Acid in Scalp Tissue and Hair Follicles

Structurally, the scalp is identical to the skin tissue located throughout the body. The exception is that it also contains about 100,000 hair follicles that give rise to hair. Actually, the hair and the hair follicle are a derivative of skin tissue. There are two distinctive skin layers. The epidermis (outer layer) gives rise to the protective shield of the body. The other, the dermal layer (deep layer), makes up the bulk of the skin and is where the hair follicle is located.

This dermal layer is composed of connective tissue and, with its gelatinous fluid-like characteristics, provides support, nourishment and hydration for the deep layers of the scalp. The result is healthy lustrous hair and a moisturized scalp. All of this is made possible because of the presence of Hyaluronic Acid in the scalp.

Hyaluronic Acid in Lips

The lips are a core of skeletal muscle covered by skin tissue. The dermal layer of the lips is composed primarily of connective tissue and its components: Hyaluronic Acid and collagen. Together, they give structure (shape) and plumpness to the lips. The HA binds to water creating a gelatinous fluid that hydrates the surrounding tissue and keeps the collagen (responsible for keeping the skin tight) nourished and healthy.

The result is healthy, hydrated and plump lips that are well protected from the environment.

Hyaluronic Acid in Eyes

Hyaluronic Acid is highly concentrated inside the eyeball. The fluid inside the eye, called the vitreous humor, is composed largely of a Hyaluronic Acid fluid composition. The HA gives the fluid inside the eye a viscous gel like property. This gel acts as a shock absorber for the eye and also serves to transport nutrients into the eye.

Hyaluronic Acid has been directly injected into the eye during procedures to help maintain the shape of the eye during surgery. Research indicates after our 5th decade, our eyes stop producing much of its needed Hyaluronic Acid, resulting in various eye issues.

Hyaluronic Acid in Gum Tissue

The gums (gingivoe) are composed of dense fibrous connective tissue (ligaments) which secure the teeth to the alveolar bone (jaw bone). Once again, connective tissue is composed of a fibrous tissue surrounded by Hyaluronic Acid (extra-cellular matrix).

Without the presence of Hyaluronic Acid, the gum tissue becomes unhealthy. With HA present, it helps support tensile strength of the ligaments that secure the tooth in place. It does this by providing hydration and nourishment. The result is a healthy set of gums.

Hyaluronic Acid in Skin

Although Hyaluronic Acid can be found naturally in most every cell in the body, it is found in the greatest concentrations in the skin tissue. Almost 50% of the body’s HA is found here. It is found in both the deep underlying dermal areas as well as the visible epidermal top layers.

Young skin is smooth and elastic and contains large amounts of Hyaluronic Acid that helps keep the skin stay young and healthy. The HA provides continuous moisture to the skin by binding up to 1000 times its weight in water. With age, the ability of the skin to produce Hyaluronic Acid decreases.

The skin is the largest organ of the body comprising about 15% of the body weight. Roughly 50% of the Hyaluronic Acid in our body is found in the skin. HA and collagen are vital to maintaining the skin’s layers and structure. It is the collagen that gives the skin its firmness, but it is the Hyaluronic Acid that nourishes and hydrates the collagen. Imagine the collagen as the stretchy fibers that restore the skin back to shape when stretched.

Collagen is like a rubber band. But stretch that rubber band a million times, like what we do with our skin and without any moisture, and eventually that rubber band gets overstretched (saggy), dried out, and will most likely break. This is much the same way the collagen in our skin reacts leaving our skin in need of moisture. Now imagine that same rubber band stretched a million times while under water the whole time. Chances of that rubber band drying out and breaking are minimal. Consider the Hyaluronic Acid as the water that keeps the collagen moist and elastic. Collagen is continuously surrounded and nourished by the gelatinous HA substance.

Young skin is smooth and highly elastic because it contains high concentrations of Hyaluronic Acid, which helps skin stay healthy. As we grow older, the body loses its ability to maintain this same concentration in the skin. With decreasing levels of HA in the skin, so goes the ability of the skin to hold water. The result, the skin becomes drier and loses its ability to maintain its hydration. Hyaluronic acid acts as a space filler by binding to water and thus keeping the skin smooth.

ECM (ground substance)

The extracellular matrix (ECM) is a gelatinous (gel-like) fluid that surrounds almost all living cells and is essential to life. It gives structure and support to the body and without it, we would just be a trillion cells without a shape or function. It is essentially the mortar between the bricks. The skin, bones, cartilage, tendons, and ligaments are examples where the ECM is located in the body. The ECM is composed of material (fibrous elements) called elastin and collagen surrounded by a gelatinous substance called Hyaluronic Acid.

Hyaluronic Acid’s roles in the ECM is to help the stretchy fibers in the body from overstretching and drying out. It does this by continually bathing them in this nutritious water base gelatinous fluid. It also serves as a wonderful medium through which nutrients and waste are transported to and from the cells of these structures. This fluid would not exist if it was not for the ability of the Hyaluronic Acid molecule to bind up to 1000 times its weight in water.


Hyaluronic Acid

† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.


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