Net loss: the method involves cutting intake to 700-800 calories a day. Illustration: Eva Bee/The Observer Net loss: the method involves cutting intake to 700-800 calories a day. Illustration: Eva Bee/The Observer It can be debilitating and last a lifetime, but type 2 diabetes, if caught early, can be reversed with weight loss Sat 15 May 2021 12.00 EDT Itâs 10 years since Professor Roy Taylor revolutionised treatment for type 2 diabetes with a groundbreaking study that showed the disease could be reversed through rapid weight loss. Until his research was published, type 2 diabetes was thought to be an incurable, lifelong condition. Now, for many people, we know it is not.