Discovery that sudden, drastic weight loss could reverse type-2 diabetes was a eureka medical moment. Until then the disease had largely been seen as a progressively deteriorating, chronic illness.
Then, in 2011, after a five-year study, Professor Roy Taylor of Newcastle University revealed that the condition could be reversed by decreasing fat inside the liver and pancreas.
In 2009, an analysis of more than 600 studies into bariatric surgery, by scientists at the University of Minnesota, had found that, in addition to dramatic weight loss, the procedure had a radical, and almost immediate, effect on type-2 diabetes.
Such revelations were a turning point for some in the approach to treatment and doctors continue to report astounding results as a result of weight loss.