PREdiabetes GLycemic Impact and Data Evaluation

Inclusion Criteria: * Age of 18 years and older. * Presence of prediabetes diagnosed according to criteria of the American Diabetes Association * Persons who treated with diet and exercise alone or metformin on a stabilized dose for at least 3 months before the study; * Ability to comply with protocol requirements and maintain a patient diary. * Signed informed consent. Exclusion Criteria: * Presence of type 1 or type 2 diabetes; * Decompensated liver or kidney diseases (GFR \< 45 ml/min/1. 73 m²); * Active cardiovascular diseases within 12 months of Visit 1, such as myocardial infarction, clinically significant arrhythmia, unstable angina, coronary artery bypass surgery, or angioplasty; or are expected to require coronary artery bypass surgery or angioplasty during the course of the study; * Endocrine disorders (e.g., Itsenko-Cushing syndrome, acromegaly) that affect glycemia; * Pregnancy or lactation; * Mental or cognitive impairments that would interfere with study participation; * Daily use of any form of steroid medication (oral, inhaled, injected) within the last 3 months; * Recent use of any CGM within the last 12 months; * Known allergy to sensor materials; * Has evidence of current abuse of drugs or alcohol or a history of abuse that, in the investigator's opinion, would cause the individual to be noncompliant; * Participation in another clinical study within the last 3 months.