Non-invasive Measurement of Glucose with Advanced Spectroscopy Techniques and Machine Learning Models

Inclusion Criteria: * Provide signed and dated written informed consent by study participant prior to any mandatory study-specific procedures, sample collection, or analysis * Apparently healthy Male or Female adult aged between 18 and 75 * Willingness to follow the study procedures Exclusion Criteria: * In Female subjects: pregnancy or breastfeeding period * A diagnosis of diabetes mellitus (any type) with ongoing insulin therapy (basal or basal plus bolus) or sulfonylurea therapy * Prior severe hypoglycemia event (stage 3 or above; e.g., seizure, loss of consciousness, emergency hospitalisation) * Prior event of severe hyperglycemia resulting in diabetic ketoacidosis or hyperosmolar hyperglycemic state, or emergency hospitalisation * Documented medical history of bleeding disorder * Being under anticoagulant medication * Insufficient knowledge of project languages (English/German) * Known sensitivity to medical-grade adhesives or other skin-related complications, which might influence the outcome