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Nutritional, Chemical and antioxidant/pro-oxidant Profiles of Silverskin, a Coffee Roasting By-Product

Nutritional, Chemical and antioxidant/pro-oxidant Profiles of Silverskin, a Coffee Roasting By-Product

Anabela S G Costa, Rita C Alves, Ana F Vinha, Elísio Costa, Catarina S G Costa, M Antónia Nunes, Agostinho A Almeida, Alice Santos-Silva, M Beatriz P P Oliveira

Food Chem. 2018 Nov 30;267:28-35.

PMID: 29934169

Abstract:

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 H2O2-induced hemolysis, but at high concentrations a pro-oxidant effect on erythrocyte morphology was observed.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP490233	β-Tocotrienol		490-23-3	Price

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