For patients with dementia, it is recommended to take some cholinesterase inhibitors, which can increase the content of acetylcholine in the brain and have certain effects on improving cognitive functions. Additionally, consuming NMDA receptor antagonists can also help improve cognition. In terms of diet, it is advised that patients eat more foods rich in unsaturated fatty acids, such as fish, shrimp, and olive oil. It's also beneficial to consume plenty of fresh vegetables and fruits, which are rich in vitamin C and can help combat oxidative stress. Drinking more milk and eating foods rich in B vitamins, mainly whole grains, is also recommended. (Medication should be used under the guidance of a doctor.)