Open AccessNutritional quality and phytochemical contents of cold pressed oil obtained from chia, milk thistle, nigella, and white and black poppy seeds
Author(s) -
Ewa Rokosik,
Krzysztof Dwiecki,
Aleksander Siger
Publication year - 2020
Publication title -
grasas y aceites
Language(s) - English
Resource type - Journals
eISSN - 1988-4214
pISSN - 0017-3495
DOI - 10.3989/gya.0679191
Subject(s) - silybum marianum , milk thistle , food science , chemistry , nigella sativa , linoleic acid , fatty acid , polyunsaturated fatty acid , botany , biology , traditional medicine , biochemistry , medicine , pharmacology
Cold pressed oils obtained from chia (Salvia hispanica L.), milk thistle (Silybum marianum L.), nigella (Nigella sativa L.), and white and black varieties of poppy (Papaver somniferum L.) seeds were characterized. The nutritional quality was determined based on the analysis of fatty acids, tocochromanol and phytosterol contents, as well as antioxidant activity and general physico-chemical properties. Among the oils analyzed the fatty acid composition most beneficial for health was found in chia seed oil, with 65.62% of α-linolenic acid and the n-6:n-3 fatty acid ratio of 1:3.5. Other oils studied were rich sources of linoleic acid (18.35-74.70%). Chia seed oil was also distinguished by high contents of phytosterols, mainly β-sitosterol (2160.17 mg/kg oil). The highest content of tocochromanols was found in milk thistle oil with dominant α-tocopherol (530.2 mg/kg oil). In contrast, the highest antioxidant activity was recorded for nigella oil (10.23 μM Trolox/g), which indicated that, in addition to tocopherols, other antioxidants influenced its antioxidant potential.