Not really, but it’s definitely related to weight and body fat, which is an indicator:
Young women with larger breasts may be at a higher risk of diabetes in adulthood, a Canadian study suggests.
The study, published in the Jan. 29 issue of the Canadian Medical Association Journal, found the larger a woman’s bra cup size is at age 20, the greater her risk of developing Type 2 diabetes later in life.
[...]
“The scientific community has long cited the role of obesity as an established risk factor for Type 2 diabetes,” said study lead Joel Ray, a physician at Toronto’s St. Michael’s Hospital, in a release. “While an elevated body mass index (BMI) and the distribution of fat around the abdomen are strongly linked to the onset of Type 2 diabetes, little is known about the impact of breast fat.
[...]
“It’s not so much the big breast size of itself, but I think women who are overweight or obese should be concerned. And this is just another marker,” he told CBC News. “It sort of correlates and it’s really not a surprise.”
He said waist circumference is a stronger indicator of Type 2 diabetes risk.
- CBC.