In 1983, he started the Colgan Institute, which is a consulting, educational, and research facility primarily concerned with the effects of nutrition and exercise on athletic performance, aging, and the prevention of degenerative disease.
Colgan has served as a consultant to a number of international companies and government agencies.
[citation needed] Colgan was born and raised in the United Kingdom.
His PhD from University of Auckland is in physiological psychology and his dissertation looked at the heart's control mechanism.
is on the Scientific Advisory Board for the network marketing product Isagenix International.