Sodium is an essential nutrient that regulates blood volume, blood pressure, osmotic equilibrium and pH; the minimum physiological requirement for sodium is 500 milligrams per day.
sˈoʊdiəm ɪz ɐn ᵻsˈɛnʃəl njˈuːtɹiənt ðæt ɹˈɛɡjʊlˌeɪts blˈʌd vˈɑːljuːm, blˈʌd pɹˈɛʃɚ, ɑːzmˈɑːɾɪk ˌiːkwɪlˈɪbɹiəm ænd pˈiː ˈeɪtʃ; ðə mˈɪnɪməm fˌɪzɪəlˈɑːdʒɪkəl ɹᵻkwˈaɪɚmənt fɔːɹ sˈoʊdiəm ɪz fˈaɪvhˈʌndɹɪd mˈɪlɪɡɹˌæmz pɜː dˈeɪ.