Cov kua txiv taum pauv yog cov khoom xyaw ntuj tsim los ntawm cov taum pauv, uas paub txog lawv cov txiaj ntsig zoo rau kev noj qab haus huv. Cov kua txiv no muaj ntau yam isoflavones taum pauv, cov protein ntawm cov nroj tsuag, cov vitamins (xws li vitamin E thiab B vitamins), thiab cov zaub mov tseem ceeb (xws li calcium, magnesium, thiab zinc). Cov isoflavones taum pauv, ib hom phytoestrogens, yog ib qho ntawm cov khoom xyaw tseem ceeb tshaj plaws hauv cov taum pauv thiab tau txais kev qhuas tshwj xeeb rau lawv cov tshuaj antioxidant muaj zog thiab tiv thaiv kev laus.

Cov isoflavones no, xws li genistein thiab daidzein, tau raug kawm txog ntau yam txog lawv lub peev xwm los tshem tawm cov free radicals phem hauv daim tawv nqaij, uas feem ntau yog tsim los ntawm kev ntxhov siab ib puag ncig xws li kev ua qias tuaj thiab UV hluav taws xob. Los ntawm kev ua haujlwm ua antioxidants, taum pauv isoflavones pab tiv thaiv cov hlwb tawv nqaij ntawm kev puas tsuaj oxidative, uas yog qhov tseem ceeb ua rau laus ua ntej, cov kab zoo, thiab wrinkles. Ntxiv rau lawv cov teebmeem antioxidant, isoflavones kuj txhawb kev rov ua dua tshiab ntawm cov hlwb tawv nqaij thiab txhawb kev tsim collagen, ob qho tib si yog qhov tseem ceeb rau kev tswj hwm daim tawv nqaij kom hluas thiab elasticity.

Lwm qhov txiaj ntsig tseem ceeb ntawm cov kua txiv hmab txiv ntoo yog nws cov phytoestrogens. Cov tshuaj no los ntawm cov nroj tsuag muaj cov qauv zoo ib yam li tib neeg cov tshuaj hormones estrogen, uas tso cai rau lawv khi rau cov receptors estrogen hauv daim tawv nqaij thiab ua raws li cov tshuaj hormones zoo. Thaum cov tshuaj estrogen poob qis nrog lub hnub nyoog, tshwj xeeb tshaj yog thaum lub sijhawm hloov cev, daim tawv nqaij tuaj yeem pib poob nws cov dej noo, elasticity, thiab tag nrho cov vibrancy. Cov phytoestrogens hauv cov kua txiv hmab txiv ntoo pab kho qee qhov ntawm cov teebmeem no los ntawm kev txhawb nqa dej noo, txhim kho daim tawv nqaij elasticity, thiab txawm tias pab txo qhov pom ntawm cov kab zoo thiab wrinkles.