What is depression?What are the main signs and symptoms of depression?How is depression diagnosed?What are some of the main medical treatments for depression?How could diet affect depression?Have any supplements been studied for depression?Are there any other treatments for depression?What causes depression?Is there a best type of exercise to protect against depression?Will creatine supplementation help prevent depression?Is there a best diet for depression?Why is depression more prevalent in women?How does exercise compare to antidepressant medication or psychotherapy for treating depression?Can vitamin D cure depression?