Pib los ntawm kev xaiv cov khoom siv raw, txhua txoj kev tsim khoom tau tsim, sim thiab txhim kho kom tsim tau cov khoom zoo, txhim khu kev qha gelatin thiab cov kev daws teeb meem rau peb cov neeg siv khoom thiab kev lag luam.Nyob rau tib lub sijhawm, txhawm rau txo qis tib neeg kev ua yuam kev thiab txhim kho kev tsim khoom, peb siv ntau yam kev lag luam-kev tsim khoom, lub tuam txhab cov cuab yeej tsim khoom tseem ceeb tau ncaj qha los ntawm Tebchaws Europe.
