Re: What's the connection between adrenal and fatigue?
If your adrenal hormone production is low (cortisol), it causes severe fatigue. Another adrenal hormone, aldosterone, if low, causes low BP from dehydration and electrolyte imbalance, worsening the fatigue, and causing dizziness when upright. Other symptoms may include loss of appetite, weight loss, skin darkening, nausea, vomiting, low blood sugars and overall weakness. A serum cortisol level in AM and PM are good for screening, but an ACTH stimulation test is needed in some cases to pick up sub-clinical adrenal dysfunction. An endocrinologist does these. Your GP can do the cortisol levels if you suspect you have this.