Utilization of Zingiber zerumbet spent, obtained after the extraction of the essential oil, as a bioactive was explored. The dried spent afforded the higher yield (7%) when extracted with aqueous ethanol (60:40) at a material to solvent ratio of 1:20. The total polyphenol content of extracts obtained from extraction of zerumbet spent with ethanol, methanol and isopropanol was 11.9, 8.5, 4.9g/100 g gallic acid equivalents respectively. Extracts exhibited good free radical scavenging activities, ranging from 23% to 92%, wherein the activity increased with increasing concentration. Ethanol extract exhibited higher antioxidant activity (92%) than methanol (87%) and isopropanol (76%) extracts at 400 ppm concentration with corresponding value for butylated hydroxyl anisole (BHA) being 93%. The ethanol extract was profiled by HPLC and was found to be enriched in demethoxycurcumin and bis- demethoxycurcumin. Their antioxidant attributes could render them useful as important nutraceuticals. The isolation and identification of curcuminoids in zerumbet spent is reported here for the first time.