metabolic diseases may predispose you of weight gain, without any calories adding to the underlying disease you won't gain weight. Also - that is my experience of being a physician of more than 30 years - most people claiming that their weight gain is due to Hypothyreosis are dismayed to learn that it isn't the case (i.e. have to change their life style instead of swallowing a pill).

About Boney, he was obese in later years, there I don't have his thyroid function tests I only can say that for sure massive eating and eating the wrong food is most likely the case that he became fat like a beer keg.

the portraits I put into the thread are painted by Anne - Louis Girodet - Trioson - at a theatre performance in St. Cloud 13th of April 1812 - and is according to the French historian Frédéric Masson one of the most accurate depiction of Boney in his later period of reining.