ʻO nā huaora he mau mea pono no ka mālama ʻana i ke ola a me ke olakino.He mea nui ia no nā ʻīlio e mālama i ke ola, ulu a ulu, mālama i nā hana physiological maʻamau a me ka metabolism.ʻAʻole i emi iki ka nui o nā huaora i ka meaʻai ʻīlio ma mua o ka protein, ka momona, nā ʻakika a me nā minela.ʻOiai ʻaʻole ʻo nā huaora he kumu o ka ikehu a ʻaʻole hoʻi ka mea nui i hoʻokumu i nā ʻiʻo o ke kino, aia kā lākou kuleana i ko lākou mau waiwai olaola.Ke kūkulu nei kekahi mau huaora i nā poloka o nā enzymes;ʻO nā mea ʻē aʻe e like me thiamine, riboflavin, a me niacin e hana i nā coenzymes me nā mea ʻē aʻe.Hoʻopili kēia mau enzymes a me nā coenzymes i ke kaʻina hana hoʻololi kemika i nā kaʻina metabolic like ʻole o ka ʻīlio.No laila, he hana koʻikoʻi loa ia i ka metabolism o nā proteins, nā momona, nā carbohydrates, nā paʻakai inorganic a me nā mea ʻē aʻe i loko o ke kino.