sarah is a freshman high school student who is also holding down a 2 0 hr week job. she drinks diet cola weveral times a day to keeo her energized withiut addinf calori 3 s and she has given up all dairy products as part of her newly balanced vegan diet. at a routine check up , herphysician warned against 3 xcessive woda consumption and recommended that she add more sources of calcium to her diet. Why?