Hyaluronic acid, also known as hyaluronan, is produced naturally by the body and found in areas with connective tissues and cartilage. It is a gel-like substance composed of glucosamine and glucuronic acid. Hyaluronic acid is responsible for cushioning and lubricating the joints. Hyaluronan is also thought to fight the degenerative effects of aging because of its anti-inflammatory properties. This acid decreases in the body with age. Individuals take hyaluronic acid supplements with hopes of combating the degenerative effects of aging or joint disorders on the body.

This acid is the primary component of synovial fluid. This fluid is found around the joints and provides them with lubrication and cushioning. It is thought to increase the viscosity of synovial fluid, which makes it a more effective lubricant. High concentrations of hyaluronic acid are also found in the eyes, skin, and heart.

Supplements containing this acid are often used to treat ailments related to joint problems, like osteoarthritis and temporomandibular joint disorder (TMJ). They work through replacing some of the cushioning and lubrication lost with age or other joint disorders. These supplements may also be used to treat fractures, hernias, glaucoma, and detached retinas. Such products are also sometimes used topically, to treat wounds, because of their anti inflammatory effects.

Hyaluronic acid used in supplements is either natural or synthetic. Natural hyaluronan is found in rooster combs, which are the large pieces of red skin on top of the bird's head. This form is thought to be more effective because it is organic. These kinds of supplements are more usually expensive than those that use a synthetic form of the substance.

Hyaluronic acid is similar to hormones in the body, like estrogen and testosterone. These have optimal levels at which they are the most effective, and it is important to keep the substances at the normal levels. Although too little is damaging, too much is also not desirable. Studies have shown a link between increased levels of hyaluronic acid and certain types of cancer.

When shopping for hyaluronic acid supplements it is important to read labels. Some manufacturers list the amounts of the acid mixture that is contained in each capsule or dose. This is not an accurate indicator of the precise quantity of active hyaluronan in the supplement. Look for products that list the amount of hyaluronic acid per dose, or serving. Hyaluronic acid supplements are available either as capsules or liquid serums.

Another important factor to consider when choosing the right brand of hyaluronic acid supplement is molecular weight. Hyaluronan has an extremely high molecular weight that is effective when injected, but when taken orally this high molecular weight makes it impossible for the body to absorb. Select a supplement that is less that 50,000 Daltons to assure that the body will absorb it.

Hyaluronic acid supplements are usually found in health stores, pharmacies, and at online retailers. It is important to consult a doctor before taking any dietary supplement. It is also worth noting that hyaluronic acid supplements are not regulated by the U.S. Food and Drug Administration (FDA).