Respected integrative medical doctor, Dr. Andrew Weil, doesn't buy into AF either:
"Adrenal exhaustion" and "adrenal fatigue" are popular diagnoses among alternative medicine practitioners but are not recognized in conventional medicine. They are often made by people not qualified by medical training (including nutritionists, chiropractors, massage therapists and health food store clerks) and are unlikely to be valid. Symptoms of adrenal exhaustion are usually vague and non-specific - fatigue, lack of energy, depression, weight problems, and insomnia. It is conceivable that very severe stress (resulting from a prolonged illness, for example) could lead to an adrenal imbalance, but I'm not sure that there is any physiological basis for the notion that everyday stress can ever "exhaust" the adrenals. Some treatments recommended for this questionable condition usually are innocuous - rest, stress reduction, a healthy diet, and vitamin/mineral supplements. Others are not, especially adrenal glandular products. I strongly advise against taking any supplements that contain adrenal glandular tissue. (In fact, never take any over-the-counter glandular supplements.) At best, they are unnecessary; at worst, dangerous. They can disrupt the body's hormonal balance, which is maintained by a delicate and interconnected set of controls. http://www.drweil.com/drw/u/id/QAA354425
Dr. oz seems open to it, but admits there is no scientific proof it exists. He also mentions women get "AF" symptoms more than men which supports my belief that "AF" symptoms are really just signs of malnutrition/starvation because women have eating disorders more than men do.
Today a growing number of complementary medicine practitioners believe daily stress has thrown our adrenal glands completely out of whack, causing an epidemic of extreme exhaustion known as adrenal fatigue syndrome. Yet the mainstream medical community has not embraced the theory since there is no scientific proof it actually exists.