" Diabetes experts said more evidence was needed to confirm the link. The study comes as other work links a high fat diet to increased breast cancer risk. "

"Much more research needs to be done before we can conclude if there is a link between high blood glucose levels and cancer"

" In this study, carried out by a team at the University of Umea, high blood sugar was also linked to breast cancer risk - for women under 49. "

" Overall, the research found women in the top 25% range of blood sugar readings after fasting had a 26% higher chance of developing cancer than those in the bottom quarter. "

" Participants were invited into the study at the ages of 40, 50 or 60 in the mid-1980s. "

" Fasting blood sugar levels were measured, as well as the amount of sugar in the blood after an infusion of glucose. Overall, the study spanned 13 years. "

" The research also found clear evidence of higher rates of hyperglycaemia - unusually high blood sugar levels - with increasing age. "

" The researchers, led by Dr Par Stattin, said: "Abnormal glucose metabolism was associated with a statistically significantly increased risk of cancer overall in women but not in men." "

" In men, raised blood sugar levels in men appeared to protect against prostate cancer, though not to a significant degree. "

" Dr Greg Martin, science and research manager for WCRF UK, said: "The results of this research are concerning. "

" "However, they are important because if women are aware of the facts, they are likely to be more motivated to change their lifestyle if their blood sugar levels are too high. "

" "And the good news is that it is possible to reduce your blood sugar
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