Apart from the ability to lose weight, control appetite etc. I found out I am lactose intolerant! I have had thyroid problems for years and thought my gut problems / headaches / tiredness were all related but found I was feeling absolutely fab on my fasting days. Figured out it may be dairy related as I wasn't having any on those days. Two weeks dairy free then glass of milk to test confirmed, and have felt great since swapping to dairy equivalents.
Anyone else learnt anything strange about themselves?