Diabetes often creeps in quietly, yet the body has ways of hinting at it long before an official diagnosis is made. Dr Grant told GB News: “It shows up mainly at night, not at bedtime.” TRENDING Stories Videos Your SaySymptoms linked to high blood sugar are easy to misread | GETTY But it’s the knock-on effect that most people actually notice. The timing of tests is important for spotting diabetes early, as Dr Grant explained: “A fasting blood glucose reading gives the clearest baseline and is the standard way to catch hidden diabetes early.” Dr Grant is also quick to note that it isn’t a test he would recommend doing casually at home.