Reverse Iontophoresis Nemaura Medical – Sugarbeat Microneedle – dermal ISF Biolinq UCSD -see AquilX | Lab in the Skin One drop Sensible Health Kilele Health IWel Health PKVitality SiBio Sensavita Needle based Subcutaneous – ISF Dexcon G6- Continuous Glucose Monitor Abbot Freestyle Libre CGM Medtronic CGM solutions A menarini Glucoday CGM Eyesense – Fluorescent producing enzyme based with Fiberoptic Needle