Alzheimer Disease(AD)

The purpose of this clinical trial is to determine whether silkworm pupa powder is effective in treating Alzheimer's disease. It will also investigate whether silkworm pupa powder can improve the nutritional and frailty status of patients with Dementia. The main questions it aims to answer are: * Will silkworm pupa powder improve the daily living conditions of patients with Alzheimer's disease? * Will silkworm pupa powder improve the nutritional status and frailty of Alzheimer's disease patients? Researchers will compare silkworm pupa powder with a placebo (a similar substance containing 0.5% silkworm pupa powder) to see if silkworm pupa powder can treat Alzheimer's disease. Participants will: * Take silkworm pupa powder or placebo daily for four months; * Visit the clinic for check-ups and tests every four weeks; * Record their symptoms and various physiological indicators.