Apple has begun asking users about the apps they use to monitor diet and blood glucose levels, leading to speculation that the next Apple Watch may be able to track users’ blood glucose levels non-invasively – but is that really likely, and why is it so important?

The main reason for measuring blood glucose is to help mange diabetes – a very serious condition that can lead to heart attacks and heart failure, strokes, sight loss, amputations, and kidney failure if not properly treated and monitored.

As Diabetes UK explains, diabetes is a condition caused when your body produces no insulin, or not enough, causing blood glucose to rise too high.
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