1, most of the bittern tofu is north tofu. Tofu made of brine as coagulant has strong hardness, elasticity and toughness, and is called old tofu, or north tofu and hard tofu.
2. Lactone tofu, using glucono-δ-lactone as coagulant, is nearly 1 times more than the conventional method; Moreover, tofu is tender, smooth, shiny, palatable, clean and hygienic.
3. In the sense of supplementing calcium, lactone tofu is not as good as traditional north-south tofu. However, tofu is only one of the sources of calcium in the normal diet, and not everyone needs to take it from tofu.