Adrenal fatigue is never a problem onto itself but a signal that your body is giving off. All disease is caused by toxins (emotional, mental physical and spiritual) and lack of nutrition (emotional, mental, physical and spiritual). Ponder that statement and if you want me to elaborate I will.
We creat our reality by our choices and from those choices manifest health and abundance or disease and lack. As we change the way we see ourselves and thus the world, our world changes as we shine.