Why N-acetyl-cysteine can help dry eye 1

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					Dry eye symptoms arise when lubrication in the cornea is insufficient.
This comes about because of insufficient tear production or substandard
quality of the tears, which results in too rapid evaporation or quick
break up of the tear film.      There are three components of the tear
film: an outer layer of lipids produced by the meibomian glands; an
aqueous (water) middle layer produced by the lacrimal glands; and an
inner layer of mucous. A malfunction in any of these layers can cause dry
eye syndrome.


  Dry eye symptoms may also be experienced if you unknowingly suffer from
diseases such as blepharitis (inflammation of the eyelids), Sjögren's
syndrome (which produces dryness in the mouth and eyes), and others.
N-Acetyl-cysteine (NAC)      N-acetyl-cysteine is of value mainly because
it is a derivative of cysteine, a sulphur-containing amino acid. From
sulphur, cysteine gains great flexibility in interacting with various
substances in the body. example, cysteine is an important element in your
body's production of taurine, a valuable amino acid, and the powerful
antioxidant glutathione.      Glutathione is made from the sulphur-
bearing amino acid cysteine and two other amino acids. Glutathione
benefits the body in many ways. This powerful antioxidant helps in the
repair of body cells after a stroke, fights cancer, brings blood sugar
levels down to normal, and protects arterial walls from damage.
Because it is the most easily absorbed form of cysteine, NAC has become
the most common source of cysteine for therapeutic purposes. NAC can be
found in animal proteins (fish, eggs, dairy, meat, and poultry) and some
vegetable proteins (e.g. soybeans).      High glutathione levels in your
blood provide you greater protection against disease and other ailments.
By increasing your intake of NAC, you enable your liver to produce more
glutathione. The body needs NAC as a primary ingredient for making
reduced glutathione (GSH), the most useful, un-oxidised form of
glutathione.      By promoting the increased production of glutathione,
NAC helps to protect your eye against oxidation and the toxic waste
materials that come with it. Your eye uses glutathione as its principal
antioxidant, and although glutathione is found everywhere in the body,
the amounts present in the eye are the highest, next only to the liver.
Many research studies have directly linked low levels of glutathione with
all types of eye diseases, so it is important to maintain normal
glutathione levels to promote eye health.      As a drug, NAC is used to
remove mucous blockages in the body, such as in the lungs of patients
with chronic emphysema, chronic bronchitis, cystic fibrosis, and
pneumonia. The antioxidant action of NAC inhibits oxidation of lipids,
which helps dissolve coagulations of mucous.      Its ability to break up
mucous, making it thinner and free-flowing, makes NAC equally useful to
treat lipid-related problems in the eyes. Several studies have shown that
use of NAC is more effective than artificial tears in producing
significant improvement in the symptoms experienced by people with
blepharitis. Trial doses involving 100mg of NAC taken three times daily
improved the constitution of the tear film, reducing the symptoms of
blepharitis.      Many research reports have reported the benefits of NAC
on Sjögren's syndrome, an autoimmune disease which also affects the
eyes. NAC's powerful property of loosening mucosal secretions clears the
cellular ducts, enabling free-flow of moisture. research studies on
people diagnosed with Sjögren's syndrome, researchers found the
associated dry eye symptoms improved with thrice-a-day doses of 200mg of
NAC.      Learn more about how to treat dry eye with N-Acetyl-cysteine
here. For further information about dry eye and how to treat it visit
ComfortEye Related Articles - dry eye, eye gel, eye spray, eye
supplements, Blepharitis, MGD, Sjorens's syndrome, red eye, watery eyes,
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