The causes of memory loss may be related to malnutrition, cerebrovascular diseases, and neurological diseases, as follows: 1. Malnutrition: Because the brain is a tissue that consumes more energy, if malnutrition occurs, such as the brain lacks the necessary proteins, vitamins or amino acids, minerals, and elements such as calcium, iron, zinc, and selenium, it will affect the normal metabolism and physiological functions of the brain nerves and brain cells, and Thus, memory loss can occur; 2. Cerebrovascular diseases: such as cerebral thrombosis, cerebral embolism, cerebrovascular malformation, cerebrovascular stenosis, etc. When these cerebrovascular diseases occur, the cerebrovascular vessels at the lesion site cause ischemia and hypoxia in the corresponding brain tissue, resulting in the lack of necessary energy in that part of the brain tissue, thus causing brain cell damage and death, leading to memory loss; 3. Neurological diseases, such as Parkinson’s and epilepsy, can also cause memory loss.