How old are you for the rest of your life?

Forty. From a biological point of view, once a person is over 40 years old, various functions of the body begin to decline gradually, such as decreased immunity and memory. In addition, according to social surveys and psychological research, people usually start to feel the pressure of middle-aged crisis around the age of 40, that is, the second half of their lives, which will also have an impact on their psychological state and attitude towards life.