Once stinky tofu is made, the most significant change in its nutritional composition is the synthesis of a large amount of Vitamin B12. Every 100 grams of stinky tofu can contain about 10 micrograms of Vitamin B12. A deficiency in Vitamin B12 can accelerate the aging process of the brain, which in turn can lead to senile dementia. In addition to animal-based foods such as meat, eggs, dairy, fish, and shrimp, which contain relatively high amounts of Vitamin B12, fermented bean products can also produce a large amount of Vitamin B12, with stinky tofu having an even higher content. Eating some stinky tofu has a positive effect on preventing senile dementia.