The supply of fat should be controlled at 20-50% of the caloric energy of food, 50-60g/day, including the fats and cooking oil contained in food. The amount of cholesterol should be controlled within 300mg/day and should not be overly restricted. If the restriction is too strict, it will affect the intake of other nutrients, and if the cholesterol is too low, it may also affect the repair of tissues and immune function. Carbohydrates should be controlled at 60-65% of the total caloric energy, especially to reduce the sugar that can only produce heat without other nutrients. There are many people like to eat stinky curd, stinky curd is rich in vitamin B12, some varieties can contain 10 mg of vitamin B12 per 100 grams, and the amount of vitamin B12 needed per person per day is 1 to 3 mg. Regularly eat curd, not only can supplement vitamin B12, but also prevent senile dementia. However, it is worth noting that stinky curd is easily contaminated by microorganisms after fermentation, and the oxidation and decomposition of proteins in tofu billets produces sulfur-containing compounds. If you eat too much stinky curd, it will have an adverse effect on your body and affect your health. In addition, the amount of salt and purine in curd is generally high, and patients with high blood pressure, cardiovascular disease, gout, kidney disease and peptic ulcer patients are advised to eat less or not to avoid aggravating their condition. Toys can develop children’s thinking skills and improve their IQ. If the elderly insist on playing with toys, they can slow down the aging of the brain. Medical experts have found that to protect the intelligence of the elderly, the brain must first be fully protected. In addition to proper nutrition and adequate sleep, the elderly should also insist on using their brains diligently, the more the brain is used, as the saying goes, “running water does not rot, and the pivot is not worm-eaten”. Therefore, the elderly should insist on playing with toys after their daily work and study.