From an alt-doc in Maryland who is an expert on AF...
Adrenal physiology in the 21st century
Forty years ago, medical practitioners thought that the adrenal glands went through stages starting with overactivity (alarm phase), to a declining phase (resistance phase) and finally to underactivity (exhaustion phase).
This is a logical model, but it doesn’t hold up to current research. We now know that under the influence of certain biochemical processes, the adrenal glands can go straight into a state of overactivity or underactivity without going through the first two phases.
For instance, through a series of biochemical processes a viral infection can throw the adrenal glands into a state of adrenal underactivity. On the other hand, food sensitivities seem to encourage the body’s physiology to promote a state of adrenal hyperactivity.