I found this question from the question and answer page on the website. This is Dr. Natasha Campbell-Mcbride's answer to the question below. Can you comment on the use of the GAPS diet for P.O.T.S. (Postural Orthostatic Tachycardia Syndrome)? Many GAPS people have POTS: you get lightheaded (almost fainting) when changing position from sitting or lying down to standing up. It is due to imbalance in the autonomic nervous system caused by toxins coming from the gut (in many people their abnormal gut flora produces too much histamine, for example). Work on your gut flora with the GAPS Protocol, and don’t forget to eat lots of animal fats, and this problem will go away. She makes it sound very simple Has anyone tried the diet? It looks pretty hard, but I would try it.