Cov khoom siv extraction no feem ntau yog siv rau hauv kev lag luam tshuaj, kev kho mob, thiab tshuaj pleev ib ce rau kev rho tawm cov tshuaj nquag lossis cov roj tseem ceeb los ntawm cov nroj tsuag tshuaj lossis tshuaj ntsuab, paj, nplooj, thiab lwm yam. Nyob rau hauv cov txheej txheem extraction, lub tshuab nqus tsev pab hloov cov nitrogen kom paub meej. tsis muaj oxidation tshwm sim hauv cov ntaub ntawv.