Iwuhlobo lwe-asidi ephilayo, ingumkhiqizo we-metabolic wezinto eziphilayo, i-asidi kanambambili, esatshalaliswa kabanzi ezitshalweni, ezilwaneni nasezikhunjini, futhi ezintweni eziphilayo ezihlukene zidlala imisebenzi eyahlukene.Kutholwe ukuthi i-oxalic acid inothile ngezinhlobo zezitshalo ezingaphezu kwekhulu, ikakhulukazi isipinashi, i-amaranth, ibhitrudi, i-purslane, i-taro, ubhatata kanye ne-rhubarb.Ngenxa yokuthi i-oxalic acid inganciphisa i-bioavailability yezakhi zamaminerali, ithathwa njengephikisana nokumuncwa kanye nokusetshenziswa kwezakhi zamaminerali.I-anhydride yayo i-carbon sesquioxide.