Compositions and methods employing liposomes including tyrosine or a tyrosine derivative
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United States of America Patent
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Mar 1, 1994
Issued Date -
N/A
app pub date -
Nov 7, 1991
filing date -
Nov 27, 1987
priority date (Note) -
Expired
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Abstract
Compositions, for example cosmetic or pharmaceutical compositions, and methods of increasing melanin formation on the skin or scalp employ liposomes including between 0.001 and 10 weight percent, with respect to the total weight of the composition, of tyrosine or a tyrosine derivative selected from the group consisting of an alkali metal salt of L-tyrosine, an alkaline earth metal salt of L-tyrosine, methyl L-tyrosinate, ethyl L-tyrosinate, and stearyl L-tyrosinate.
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