The goal of this interventional study is investigating the effect of the daily consumption of olive leaves tea on glycemic control of individuals diagnosed with pre-diabetes. The hypothesis of this study is that the integration of olive leaf tea on daily food consumption will favors glycemic control and ameliorate insulin resistance in individuals with pre-diabetes.

This study is a triple-blinded, randomized, placebo-controlled trial with parallel assignment

Inclusion Criteria:

At least one of three glycemic criteria for pre diabetes as defined by 2022 American Diabetes Association (ADA) guidelines:

• Fasting plasma glucose level, 100 to 125 mg per deciliter (5.6 to 6.9 mml per liter);
• Plasma glucose level 2 hours after a 75-g oral glucose load, 140 to 199 mg per deciliter (7.8 to 11.0 mml per liter);
• Glycated hemoglobin level, 5.7 to 6.4% (39 to 47 mml per mole).

Exclusion Criteria:

• Current use of medication for lowering blood cholesterol, glucose or hypertension;
• History of chronic or severe diseases that may affect study outcomes or limit study participation;
• Pregnancy and breastfeeding

All participant data will be collected anonymously and only individual data related to the outcomes will be available upon request

After the publication of the final results during two years

Will be available upon request to researcher

The masking is from the responsibility of the tea supplier which was asked to send the tea/placebo codified and only reveal the codification after the end of the trial.