As with any perishable food, check the expiration date. Some kinds of tofu can be stored in your refrigrerator for one week if the tofu is covered with water and the water is changed daily. Water keeps the tofu from drying out or absorbing the flavor of other foods nearby. Aseptically packaged tofu must be consumed or frozen within two or three days. Tofu also can be frozen for up to five months.
Defrosted tofu has a chewy consistency and is excellent for absorbing flavors.
Tofu's Nutritional Profile Tofu is an excellent source of high quality vegetable protein. It contains all nine amino acids that people must consume for good health. Tofu also can be a good source of calcium. One of the curdling agents that can be used to make tofu is calcium salt. Some tofu manufacturers also are starting to fortify tofu with calcium.