In order to start of a thesis statement about mental health, you’ll need to think of a question. For example, “Many people wonder what the main cause of depression is” and then after that you should answer the question. Here’s my example:
Many people wonder what the main cause of depression is. According to studies, there’s servers factors which are the main causes such as abuse, death or a loss, major events and other personal problems.
And that’s a thesis. ^