10. They rely on natural sources
Centenarians can live a very long life if they just allow themselves to be happy and live as naturally as possible. Centenarians can live more than one century and reach 100 years old. Some of these centenarians have attained their centenarian status after being alive for over a hundred years. Others attained it after being alive for only fifty years. They still continue to live fulfilling and enjoyable life as they age because they took the time to think about the important things in life and live life to the fullest.