What are the causes of adrenal insufficiency?

Causes of adrenal insufficiency include:

1.  Excess stress. Dr. Hans Selye, one of the first doctors to research stress reactions, found that if an animal becomes severely overstressed, its adrenal glands bleed and develop signs of adrenal destruction before the animal finally dies from the stress. I suspect that many people suffer exhaustion of their adrenal glands, but without the adrenal gland destruction that Hans Selye saw in his experimental animals.

2.  Excess caffeine. This has been shown to amplify your body's reaction to low blood sugar.

3.  Nutritional deficiencies. Especially vitamin C, chromium and pantothenic acid (vitamin B5).