A study performed in London using data from 80 different countries finds that depression is most common among men and women in their forties. The countries studied ranged widely in development status but all but eight of them followed a U-shaped pattern of disbursement when it came to happiness-age relationships.
The study tested some 2 million people on depression, anxiety and general metal health and well being. Regardless of the demographic, whether married or single, with or without children and rich or poor, the truth comes out that people in their forties are sadder worldwide.
The dip in mental health and happiness comes on slowly, not all at once and most people do not begin to emerge from the slump until they approach their fifties. Although some speculation exists regarding the cause of this age-related depression, nothing has been positively determined.
The good news is that if you manage to reach 70-years old and still retain your physical health, you will, on average, be as happy and mentally healthy as a 20-year old.
For those of you just entering your forties, that really sucks. Look forward to a decade of pain and sorrow as you realize how many of your dreams will never be realized and wait for the day that the deaths of your friends gives you a new appreciation on life allowing you to climb out of the black pit of despair.