He ʻano ʻakika organik, he huahana metabolic o nā mea ola, binary acid, laha nui ʻia i nā mea kanu, nā holoholona a me nā haʻani, a ma nā mea ola like ʻole e pāʻani i nā hana like ʻole.Ua ʻike ʻia ka waiwai o ka oxalic acid ma mua o 100 mau ʻano mea kanu, ʻoi aku ka spinach, amaranth, beet, purslane, kalo, ʻuala a me ka rhubarb.No ka mea hiki i ka oxalic acid ke hōʻemi i ka bioavailability o nā mea mineral, ua manaʻo ʻia he antagonist no ka absorption a me ka hoʻohana ʻana i nā mea mineral.ʻO kona anhydride he carbon sesquioxide.