REQUIMTE/LAQV, Department of Chemical Sciences, Faculty of Pharmacy of University of Porto, R. Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
REQUIMTE/LAQV, Department of Chemical Sciences, Faculty of Pharmacy of University of Porto, R. Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; FP-ENAS (UFP Energy, Environment and Health Research Unit), CEBIMED (Biomedical Research Centre), University Fernando Pessoa, R. Carlos da Maia, 296, 4200-150 Porto, Portugal.
Food Chem. 2018 Nov 30;267:28-35. doi: 10.1016/j.foodchem.2017.03.106. Epub 2017 Mar 21.
Coffee silverskin (a coffee roasting by-product) contains high amounts of dietary fibre (49% insoluble and 7% soluble) and protein (19%). Potassium (∼5g/100g), magnesium (2g/100g) and calcium (0.6g/100g) are the major macrominerals. The vitamin E profile of silverskin comprises α-tocopherol, β-tocopherol, ɣ-tocopherol, δ-tocopherol, β-tocotrienol, ɣ-tocotrienol, and δ-tocotrienol. The fatty acid profile is mainly saturated (C16:0 and C22:0), but the total amount of fat is low (2.4%). Caffeine (1.25g/100g), chlorogenic acid (246mg/100g), and 5-hydroxymethylfurfural (5.68mg/100g) are also present in silverskin. Total phenolics and flavonoids are partially responsible for the in vitro antioxidant activity. Silverskin extracts protected erythrocytes from oxidative AAPH- and HO-induced hemolysis, but at high concentrations a pro-oxidant effect on erythrocyte morphology was observed.
咖啡银皮（咖啡烘焙副产物）含有大量膳食纤维（49%不溶性和 7%可溶性）和蛋白质（19%）。钾（约 5 克/100 克）、镁（2 克/100 克）和钙（0.6 克/100 克）是主要的宏量矿物质。银皮中的维生素 E 谱包括α-生育酚、β-生育酚、γ-生育酚、δ-生育酚、β-生育三烯酚、γ-生育三烯酚和δ-生育三烯酚。脂肪酸谱主要为饱和脂肪酸（C16:0 和 C22:0），但总脂肪含量较低（2.4%）。银皮中还含有咖啡因（1.25 克/100 克）、绿原酸（246 毫克/100 克）和 5-羟甲基糠醛（5.68 毫克/100 克）。总酚类和类黄酮部分解释了其体外抗氧化活性。银皮提取物可保护红细胞免受 AAPH 和 HO 诱导的氧化溶血，但在高浓度下，对红细胞形态的促氧化作用观察到。
