Prediabetes: You don’t have diabetes yet, so why are doctors worried?

Prediabetes is a state where blood sugar levels are higher than normal but not high enough to qualify as type 2 diabetes. It sounds mild, and many call it a “pre-warning.” Yet doctors treat it with serious concern. That’s not alarmism, it’s a warning that is based on what science and health agencies are learning about long-term risk and early damage.Prediabetes isn’t diabetes, but calling it “just a checkpoint” sells it short. In the US, more than two out of five adults have prediabetes. Most don’t even know it. When blood sugar sits above normal over years, it quietly affects blood vessels, heart function, and metabolism. That means the body isn’t far from overt type 2 diabetes, an illness linked to blindness, kidney failure, heart disease, stroke and limb amputations.Doctors don’t want to wait until complications appear. They see prediabetes as an early warning system, not a benign checkpoint.Speaking to TOI Health, Dr Shivani Chauhan, Consultant - Department of Endocrinology & Diabetes, Yatharth Hospital Greater Noida, said, "Prediabetes is the term used for individuals whose glucose or HbA1C levels don’t meet criteria for diabetes. Yet these individuals have abnormal carbohydrate metabolism that results in dysglycemia intermediate between normoglycemia and diabetes. People with prediabetes are defined by presence of IFG (impaired fasting glucose) & /or IGT (impaired glucose tolerance) & /or HbA1c - 5.7 - 6.4 percent."Heart doctors, endocrinologists and primary care physicians worry about prediabetes because it rarely stays innocent. Here’s why:Doctors want to catch this stage early, before the damage becomes entrenched.To this Dr Chauhan explained, "It is also linked symptoms including hypertension, obesity and dyslipidemia. It is important to address this as it is a significant risk factor for diabetes progression as well as cardiovascular diseases and several other cardio metabolic outcomes. Lifestyle modifications remain the intervention of choice but weight loss pharmacotherapies and bariatric surgery in obese individuals provide additional options for altering course of this disease." It’s normal to think, “I’m not diabetic yet, so I’m safe.” But that’s misleading.Prediabetes tells a story: your body is struggling to use insulin, the hormone that helps sugar enter cells for energy. Left unchecked, these struggles turn into health problems that affect daily life.Ignoring this condition is like ignoring a high temperature, it’s a sign something in the body isn’t right.Several factors in today's lifestyle make prediabetes more prevalent than ever:These trends somewhat explains why even young adults and teenagers are showing early signs of blood sugar issues.When prediabetes is detected, doctors focus on reversing or halting progression. The key tools are not always medications.This is not simply a theory. Various studies reveal that focused lifestyle interventions lower blood sugar levels and minimize the chance of developing diabetes in the future.Most people with prediabetes have no symptoms and feel fine. That’s why routine screening is vital. A simple blood test, fasting glucose or HbA1c, can reveal elevated sugar well before symptoms appear.Early awareness changes outcomes. A timely diagnosis gives people a chance to change the trajectory of their health.Prediabetes does not have to lead directly to diabetes. Many people have achieved normal blood sugar levels by adding long-term lifestyle modifications.This early window offers an important opportunity to reset health before severe issues occur.As health author and physician Mark Hyman once said: “Your body whispers before it shouts.” Prediabetes is that whisper, quiet but telling.Medical experts consulted This article includes expert inputs shared with TOI Health by: Dr Shivani Chauhan, Consultant - Department of Endocrinology & Diabetes, Yatharth Hospital Greater Noida.Inputs were used to explain why what is prediabetes and how is it different from diabetes and what should a person do about it.