Macushield capsules of Douglas Laboratories
provide a multi-vitamin and mineral formulation with
several key nutrients, including vitamin A, betacarotene,
bilberry extract, L-taurine, L-glutathione,
and zinc, that are important in maintaining normal eye
More than any other tissue in the body, the ocular
lens and retina are continually exposed to oxygen and
intense light radiation. Both light and oxygen can
create free radicals that play havoc with membrane
lipids of visual cells. Experts believe that the
uncontrolled generation of free radicals in the eyes
can ultimately lead to macular degeneration and
cataracts. Therefore, ocular tissue relies on a strong
antioxidant defense system to protect them from free
Extracts of bilberry and Ginkgo biloba, green tea,
rutin, quercetin, and hesperidin are a rich source of
flavonoids that provide potent antioxidant defense in
retinal visual cells and help maintain healthy
vascularization in ocular tissue.
Glutathione and selenium are essential components
for healthy activity of the antioxidant enzyme
glutathione peroxidase which is abundant in healthy
eyes. Glutathione peroxidase levels, however, decline
with advancing age, and an adequate dietary supply
of glutathione, its precursor N-acetyl-L-cysteine, and
selenium may help maintain healthy levels of this
Beta-carotene serves at least two purposes for the
eyes. It is a valuable precursor for vitamin A which
functions in the retinal cells as a light receptor. Betacarotene,
as well as other carotenoids in
Macushield, such as lutein and lycopene, are also
important antioxidants in the lens and retina.
Zinc is not only essential for normal visual signal
transduction in the retina, but also is part of many of the enzymes involved in vitamin A dependent light
reactions in retinal cells. Moreover, zinc, as well as
copper and manganese, are essential cofactors of
superoxide dismutase, an antioxidant enzyme that
removes potentially dangerous superoxide radicals in
the visual cells, the lens, and other tissues.
Taurine, the most abundant free amino acid in ocular
tissue, is thought to help stabilize neural membranes
in retinal cells and modulate photoreceptor activity.
Macushield capsules may be a useful dietary
supplement for those who wish to increase their
intake of nutrients that may improve the functioning
of their vision.
Adults take 6 capsules daily or as directed by
Store in a cool, dry place, away from direct light.
Keep out of reach of children.
California Residents Prop 65 WARNING: This product contains a substance known to the State of California to cause birth defects or other reproductive harm.