The NHS says once food is digested and enters your bloodstream, this hormone helps absorb glucose from your bloodstream and into your cells.
Here, sugar is broken down to produce energy. However, if you have diabetes, your body cannot go through this process.
Because diabetics cannot produce any insulin, either do not produce enough or the type they produce is not effective.
As a result, your blood sugar can rise to dangerous heights.
Source: | This article first appeared on Express.co.uk