Human: Is it normal for people to experience a change in their mood as they age? Assistant: 
It’s common for people to experience changes in their mood as they get older. As we get older, our bodies and minds can become more vulnerable to illnesses or other physical and mental health issues that can affect our mood. Additionally, life transitions such as retirement, marriage, divorce, death of a loved one, job loss, or moving to a new city can also cause us to feel less happy or depressed.