[orionsbelt]

Is it not the case that as BMI increases the risk increases? My BMI is not healthy - and I don’t deny that makes me subject to increased risk - but I would still think morbidly obese is far worse than obese which is worse than overweight, in terms of risk of diabetes, cardiovascular disease, etc.

[Izkata]

Not strictly. Over the past few decades I've occasionally but regularly seen evidence that "overweight but not obese" (BMI 25-30) might actually be healthier than a normal weight (BMI 18.5-25). In those studies obese did have a worse outcome than both.

IIRC mostly they had to do with seasonal sicknesses like the flu, the theory being that your body can burn the extra fat during periods you aren't able to eat well.

[throwway120385]

That's essentially what "morbidly" means.