Memory is the ability of a person to remember things that have happened or things that have happened. Memory is the sum of a person’s ability to perceive past feelings, experiences, and occurrences. Physiologically speaking, a person’s brain capacity reaches its peak around the age of 20, which is also the time when a person’s memory is at its best. As people age, all organs of the body begin to age and deteriorate, and memory will also gradually decline, which is a normal physiological phenomenon. It is important to be aware of the gradual, slow progression of memory loss in older adults, and to be aware of cognitive disorders, such as degenerative diseases or infections and dementia caused by cerebrovascular disease, so memory is a major cause for concern. Many older adults may be concerned about their memory loss and worry about Alzheimer’s. In fact, the majority of older adults with memory loss have Alzheimer’s disease. In fact, the vast majority of memory loss in older adults is a normal, benign process related to age and aging. Only a small percentage of seniors with memory loss eventually develop dementia, so seniors don’t need to worry too much.