Clinical Research Directory

Inclusion Criteria: * Adults aged between 35-65 years old; * Being prediabetes as assessed by having fasting plasma glucose (FPG) level in the range of 100 mg/dL to 125 mg/dL; having 2-h values in the oral glucose tolerance (OGTT) level in the range of 140 mg/dL to 199 mg/dL; * The study subjects will be recruited from household communities connected to any health care facilities such as primary health center, private clinics or private GP/specialist on the national health care system; * The subjects are willing to sign informed consent; * The subjects are willing to stay commitment during the study, at least 1 year; * Having app-android mobile Exclusion Criteria: * Pregnancy or lactation women; * Transgender on hormonal injection; * Bariatric surgery; * Consuming other pills supplementation containing zinc and/or chromium, copper, vitamin C in regular basis; * History of Inflammatory Bowel Disease (IBD), psychiatric disorders, chronic diseases (e.g., HIV, Cushing syndrome, CKD, acromegaly, hyperthyroidism, etc.); * Not healthy (current status of the severely malnourished, acute problem of any severe disease, history of impaired hepatic, renal failure, heart failure, cancer, other catastrophic diseases. * Currently using weight loss medication; * Consuming pharmacology agents that might interfere the intervention (such as metformin, methylprednisolone, methyltestosterone, diuretics, complementary medicines); * Subjects who are unable to read and understand the statements of consent form