Does bread lose its vitamins when stored? small loaves of bread were prepared with flour that was fortified with a fixed amount of vitamins. after baking, the vitamin c content of two loaves was measured. another two loaves were baked at the same time, stored for one day, and then the vitamin c content was measured. in a similar manner, two loaves were stored for three, five and seven days before measurements were taken. the units are milligrams per hundred grams of flour (mg/100 g). here are the data.