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this product is listed in the U.S. Physicians' 2001 PDR
(Physicians Desk Reference) & Doctors Redbook.
PDRŽ entry for glutathione
Powder Sachets (This Company
)
DESCRIPTION
THI PRODUCT is a U.S. patented natural food protein
concentrate which assists the body in maintaining an optimal
concentration of glutathione (GSH) by supplying the precursors
required for intracellular glutathione synthesis. These precursors are
derived from a specially prepared bovine whey protein isolate.
Glutathione (L-gamma-glutamyl-L-cysteinylglycine) is the major
endogenous antioxidant produced by the cell. Glutathione participates
directly in the neutralization of free radicals, reactive oxygen
compounds, and maintains exogenous antioxidants such as vitamins C and
E in their reduced (active) forms. In addition, through direct
conjugation, glutathione plays a role in the detoxification of many
xenobiotics (foreign compounds) both organic and inorganic.
Glutathione is an essential component of the human immune response.
Proposed mechanisms of immune enhancement include:
- optimizing
macrophage functions,
- offsetting
oxidative damage associated with lymphocyte monoclonal expansion and
- stabilizing the
mitochondrial membrane thereby, reducing apoptosis in lymphocytes.
CLINICAL PHARMACOLOGY
The
systemic availability of oral glutathione is negligible; the vast
majority of it must be manufactured intracellularly. Glutathione (GSH)
is a tripeptide made up of the three amino acids: cysteine, glycine
and glutamate. Glutamate and glycine are readily available in most
North American diets, but the availability of cysteine the
rate-limiting substrate for the synthesis of glutathione within the
cell. It is the sulfhydryl (thiol) group (SH) of cysteine that serves
as proton-donor and is responsible for the biochemical activity of
glutathione. The free amino acid cysteine does not represent an ideal
delivery system to the cell. It is potentially toxic and is
spontaneously catabolized in the gastrointestinal tract and blood
plasma. Conversely, cysteine absorbed during digestion as cystine (two
cysteine molecules linked by a disulfide bond) in the gastrointestinal
tract is more stable than the free amino acid, cysteine. The disulfide
bond is pepsin- and trypsin-resistant, but may be split by heat, low
pH, and mechanical stress. Cystine travels safely through the GI tract
and blood plasma and is promptly reduced to the two cysteine molecules
upon cell entry. this product can thus be viewed as a cystine delivery
vehicle.
Cystine
is the preferred form of cysteine for the synthesis of glutathione in
macrophages and astrocytes. Lymphocytes and neurons prefer cysteine
for glutathione production. Optimizing glutathione levels in
macrophages and astrocytes with cystine allow these cells to provide
cysteine to lymphocytes and neurons directly upon demand.
This
specially prepared whey protein isolate contains the thermolabile
proteins serum albumin, alpha lactalbumin and lactoferrin. These
proteins contain high levels of cystine residues that could be
denatured by heat, low pH, or mechanical stress (inherent in most
extraction processes). In serum albumin there are 17 cystine residues
and 6 glutamylcystine (Glu-Cys) dipeptides; in lactoferrin 17 cystine
residues and 4 Glu-Cys dipeptides; and in alpha-lactalbumin 4 cystine
residues. In particular, the Glu-Cys dipeptides very readily enter the
cell to be synthesized into GSH. Of interest, the Glu-Cys dipeptide is
an exclusive feature of the only obligatory foods in the early life of
mammals and oviparous species, those being milk and egg white
respectively. When subject to heat or shearing forces, the fragile
disulfide bonds within these peptides are broken and the
bioavailability of the glutathione precursors is greatly diminished.
As an
antioxidant, glutathione is essential for allowing lymphocytes to
express their full potential, without being hampered by oxyradical
accumulation during the oxygen-requiring development of the immune
response. In a similar fashion, GSH delays the muscular fatigue
induced by oxyradicals during the aerobic phase of strenuous muscular
contraction.
As a
detoxification agent, glutathione has been demonstrated to be
effective against a number of xenobiotics, including chemical
pollutants, various carcinogens and ultraviolet radiation.
Glutathione is a tightly regulated intracellular constituent
and is limited in its production by negative feedback inhibition of
its own synthesis through the enzyme gamma-glutamylcysteine
synthetase, thus greatly minimizing any possibility of overdosage.
INDICATIONS AND USAGE
this productis a natural food supplement and as such is
limited from stating medical claims per se. Statements have not been
evaluated by the FDA. As such, this product is not intended to
diagnose, cure, prevent or treat any disease.
Glutathione augmentation is a strategy developed to address
states of glutathione deficiency, high oxidative stress, and
xenobiotic overload in which glutathione plays a part in the
detoxification of the xenobiotic in question. Glutathione deficiency
states include, but are not limited to: AIDS and cancer cachexia,
chemical and infectious hepatitis, radiation poisoning, malnutritive
states, arduous physical stress, and has been associated with
sub-optimal immune response. Many clinical pathologies are associated
with oxidative stress and are elaborated upon in numerous medical
references.
CONTRAINDICATIONS
this productis contraindicated in individuals who develop
or have known hypersensitivity to specific milk proteins.
PRECAUTIONS
Each
sachet of this product contains nine grams of protein. Patients
on a protein-restricted diet need to take this into account when
calculating their daily protein load. Although a bovine milk
derivative, this product contains less than 1% lactose and
therefore is generally well tolerated by lactose-intolerant
individuals.
WARNINGS
Patients undergoing immunosuppressive therapy should discuss
the use of this product with their health professional.
Heating
or adding this product to a hot liquid, or use of a high-speed
blender to reconstitute it will significantly decrease the
effectiveness of the product.
ADVERSE REACTIONS
Gastrointestinal bloating and cramps if not sufficiently
rehydrated. Transient urticarial-like rash in rare individuals
undergoing severe detoxification reaction. Rash abates when product
intake stopped or reduced.
OVERDOSAGE
Overdosing on this product has not been reported. Unless
hypersensitive to the constituents, no toxicity of milk proteins has
been described.
DOSAGE
AND ADMINISTRATION
Maintenance dose is one sachet (10 grams) per day. For mild to
moderate health challenges, higher doses are recommended. Clinical
trials in patients with AIDS, cancer and chronic fatigue syndrome have
used 30-50 grams per day without ill effect. this product is best
administered on an empty stomach or with a light meal. Concomitant
intake of another high protein load may adversely affect absorption.
RECONSTITUTION: this product is a dehydrated powdered
protein isolate. It must be appropriately rehydrated before use. If
left standing too long after rehydration, activity of the product may
be reduced. Times vary depending on temperature and pH of the liquid
used. It is generally recommended to ingest the product within 30
minutes of reconstitution. DO NOT heat or use a hot liquid to
rehydrate the product or use a high-speed blender for reconstitution.
These methods will decrease the activity of the product. Special
low-speed blenders or mixing cups can be made available through
NuMedTec distribution networks.
Proper
mixing is imperative. Consult instructions included in packaging.
HOW
SUPPLIED
10
grams of bovine milk protein isolate powder per sachet.
30
sachets per box.
STORAGE
Store
in a cool dry environment. Refrigeration is not necessary.
Patent
no.'s 5,230,902 - 5,290,571 - 5,456,924 - 5,451,412 - 5,888,552
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New aspects of glutathione biochemistry and transport, selective
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