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Retinyl palmitate, or
vitamin A palmitate, is the
ester of
retinol (vitamin A) and
palmitic acid, with
formula C36H60O2. It is the most
abundant form...
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Retinyl acetate (retinol acetate,
vitamin A acetate) is a natural[dubious – discuss] form of
vitamin A
which is the
acetate ester of retinol. It has potential...
- a
group of
chemically related organic compounds that
includes retinol,
retinyl esters, and
several provitamin (precursor) carotenoids, most
notably β-carotene...
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human diet are
plant pigments such as
carotenes and
retinyl esters derived from
animal sources.
Retinyl esters are
transported through the
chylomicron pathway...
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refers to the
toxic effects of
ingesting too much
preformed vitamin A (
retinyl esters, retinol, and retinal).
Symptoms arise as a
result of
altered bone...
- O2
which is
formed during photosynthesis. β-Carotene is
composed of two
retinyl groups, and is
broken down in the
mucosa of the
human small intestine by...
-
vitamin A can
cause these problems because the
conversion of
carotenoids or
retinyl esters into
vitamin A is
downregulated when
physiological requirements...
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leads to
formation of
toxic cationic bis-pyridinium salt, N-retinylidene-N-
retinyl-ethanolamine (A2E),
which causes dry and wet age-related
macular degeneration...
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blindness includes m****ive
doses of
vitamin A (200,000 IU) in the form of
retinyl palmitate to be
taken by mouth,
which is
administered two to four times...
-
dosages in
excess of 10,000 IU, or 3,000
retinol equivalents. (NOTE: Retinol/
retinyl esters arerequired and
essential for
maintenance of
normal reproductive...
