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Hemp‐seed and olive oils: Their stability against oxidation and use in O/W emulsions
Author(s) -
Sapino S.,
Carlotti M. E.,
Peira E.,
Gallarate M.
Publication year - 2005
Publication title -
international journal of cosmetic science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 62
eISSN - 1468-2494
pISSN - 0142-5463
DOI - 10.1111/j.1467-2494.2005.00290_2.x
Subject(s) - peroxide value , food science , chemistry , olive oil , acid value , tocopherol , antioxidant , edible oil , vegetable oil , oleic acid , botany , vitamin e , biology , organic chemistry , biochemistry
Hemp‐seed oil has several positive effects on the skin: thanks to its unsaturated fatty acid (PUFA) content it alleviates skin problems such as dryness and those related to the aging process. We present a comparative study of hemp‐seed and olive oils, determining some physicochemical indices and evaluating their stability against oxidation. The peroxide value of hemp‐seed oil was below 20, the threshold limit for edible oils. Hemp‐seed oil was less stable against peroxidation than olive oil, but MDA and MONO assays showed its stability to be above expectations. The chlorophyll contained in extra virgin olive oil had a higher photostability than that contained in hemp‐seed oil, possibly due to the larger amount of antioxidant in the olive oil. A certain amount of Vitamin E was found in hemp‐seed oil. Since quality analyses indicated that hemp‐seed oil is relatively stable, emulsions were prepared with the two oils, and their stability and rheological characteristics were tested. Some of the resulting gel–emulsions were suitable for spraying on the skin.