I come from two big extended families. On my dads side we have the usual mix of body shapes, but among my many cousins and aunts there is not one t2d. they tend to die from cancer and heart disease.
On my mums side, again with a mix of body shapes, you cannot attend a family gathering without some discussion of various autoimmune conditions. As well as t2d we have t1d, hasimotos disease (and underactive thyroid where we have not been tested for hashi)multiple sclerosis, ankylosing spondylitis and other forms of arthritis and something one of my grandsons invented for himself. Two of my cousins children have had gestational diabetes, so I guess they will be prime candidates for t2d. No pcos and we tend to be a fertile bunch, which is odd really, when you consider how dreadful our collective immune systems must be. Some of my family are obese, some aren't, but it hasn't seemed to impact on who has what. My mum, for example, has never weighed more than 8st all her life and she is as tall as me (5ft 6ins). But 20 yrs ago she developed t2d. And was told she had an underactive thyroid.
I was quite annoyed with the presenter when she said that this was a lifestyle disease, but her t1d wasn't. She said it several times, so it must be important to her. I think what I was looking for in this question was some studies that looked at the maths. How many obese people NEVER develop t2d? That seems quite an important question. As many think, it has to be genetic and I have found some studies which pin point some of the genes required. I have seen the figure of 80% obese people never developing t2d, but cannot find any confirmation of this. Does anyone know?
I quite like
@bulkbiker s approach and will have another look at that.
Many thanks to all who took the time to answer. Very helpful when trying to argue with those who tell us its all our own fault.