By William J. Walsh, Ph.D. , Walsh Research Institute (Naperville, IL)

Each of us has innate biochemical factors which influence personality, behavior, mental health, immune function, allergic tendencies, etc. Scientists tell us that the number of different genetic combinations possible in a child from the same two parents exceeds 42 million. It's interesting to note that we do not possess a combination of characteristics from our parents, but instead have a diverse collection of characteristics from many ancestors on both sides of the family.