They are wearable devices that use a microneedle inserted into the skin ... Apple meanwhile is rumoured to be developing non-invasive glucose sensor technology for its watches.

Other common alternatives are also invasive. 2 Ki Jun Yu, an electrical engineer at Yonsei University and coauthor of the study, set out to tackle the current problems in diabetes monitoring ...

The sensor uses nanoscale DNA-based receptors ... comparable in size to those used in continuous glucose monitors. This microneedle, thinner than three human hairs, samples interstitial fluid ...