OGTT at Home Using CGM vs at the Clinic

Inclusion Criteria: * Prediabetes indicated by ≥2 of the following values, measured at separate occasions or through different analyses during the past 2 years: * \- Fasting venous plasma glucose ≥6.1 but ≤6.9 mmol/L * \- Non-fasting venous plasma glucose ≥7.8 but ≤11.0 mmol/L * \- HbA1c ≥39 but ≤47 mmol/mol * Access to a smart phone which is compatible with the CGM application and has working Bluetooth connectivity * Ability to read and respond to online instructions and questionnaires in Swedish. Exclusion Criteria: * T2D indicated by ≥2 of the following values, measured at different occasions or through different analyses: * \- Fasting venous plasma glucose ≥7.0 mmol/L * \- Non-fasting venous plasma glucose value ≥11.1 mmol/L * \- HbA1c ≥48 mmol/mol * Previous bariatric surgery e.g., gastric by-pass or gastric sleeve surgery * Body mass index \<20 kg/m2 * Body weight \<43 kg * Current pregnancy * Need of regular use of GLP-1 receptor agonists, SGLT-2 inhibitors, acetaminophen or ascorbic acid supplements during the study period * Fear of needle sticks * Shift work during the study period * Involvement in the study design, data collection, analysis, or participant recruitment.