The study revealed that women wearing a D-cup bra by 20 years old have a 60 percent higher risk of developing diabetes, compared to those who wear A-cups by the same age.
About 92,000 women were observed in an analysis that started in 1989, according to the UPI, and 1,844 developed diabetes.
According to the researchers, the findings are without the influence of body mass index or other weight factors.
"It isn't just about abdominal obesity, but also the contribution of fat tissue in another place," lead author Dr. Joel Ray of the St Michael's Hospital was quoted by The Star.
According to the study, the accumulation of fat in women's breasts were identified as additional factors that increase the risk of developing the condition. The risks posed were said to increase in level the bigger the cup size got.
This was explained by how the tissues within a woman's breast were said to be contributory to the resistance of insulin, thereby resulting in diabetes.
Ray also noted that adolescent obesity contributed to the breast size during adulthood. He noted that the data collected in the study was most likely affected by the overall weight of the respondents, and not just the cup size.
The research was described as merely preliminary, with Dr. Ray emphasizing that more research on the topic was needed.
The results of the study were published in an issue of Canadian Medical Association Journal.
