The skins of two white wine grape pomace (WWGP) and three red wine grape pomace (RWGP) from US Pacific Northwest were analyzed for their dietary fiber (DF) and phenolics composition. DF was measured by gravimetric-enzymatic method with sugar profiling by HPLC-ELSD. Insoluble DF composed of Klason lignin (7.9-36.1% DM), neutral...