Ulusi wazakudya za soya makamaka umatanthawuza mawu oti shuga wokhala ndi mamolekyulu ambiri mu soya womwe sungathe kugayidwa ndi michere ya m'mimba ya anthu.Zimaphatikizapo mapadi, pectin, xylan, mannose, ndi zina zotero. Ngakhale ulusi wazakudya sungapereke zakudya zilizonse m'thupi la munthu, ukhoza kuyendetsa bwino shuga m'magazi a thupi la munthu, kuteteza kudzimbidwa, ndikuwonjezera kukhuta.