Globally, diabetes is expanding quickly day by day and patients need continuous observation of glucose levels. Currently, techniques that are utilized causes pain, as they need blood samples, and need more time to use. To overcome these challenges, new innovations are being explored which include non-invasive and minimally invasive techniques that are easy to use and cause no pain. This review provides an exceptional report on the main advances, which has been at present being worked on, and is accessible in the market. The principle of every technology, its benefits and limitations are referenced exhaustively. Despite the fact that there has been a progression in the advancements, non-invasive techniques could in any case be improved in terms of dependability and usage. The review concludes that there is a requirement for additional investigations to be done under various physiological conditions of the body.
Keywords: Diabetes; Glucose monitoring; Minimally-invasive; Non-invasive; Spectroscopy