carotenoid content of commonly consumed vegetable was not significantly influenced by high pressure or high pressure high temperature treatment at 70 C and 117 C.An increase of lutein or beta-carotene could be detect in some cases after HP and HPHT at 70 c treatment, which would probably be due to an increase of the extractability of these compounds. Only a minor loss of beta-carotene and lutein was found in red papper and green papper, respectively, after the HPHT at 117 C .
carotenoid isomerisation was only found to be significant in the occurrence of the 13-cis-beta-carotene in red papper after more intense treatment