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Table 1 Inclusion and exclusion criteria

From: Polyherbal dietary supplementation for prediabetic adults: study protocol for a randomized controlled trial

Inclusion Exclusion
Aged ≥18 years
Fulfill prediabetes’ diagnostic criteria, determined by blood measurement values obtained within past 12 weeks
Agree to continue with current diet and refrain from taking any new nutritional or herbal supplements during the study
Agree to continue with current physical activity level throughout study period
Able to understand and write English
Voluntarily consent to the study and understand its nature and purpose including potential risks and side effects
Current daily use of any oral hypoglycemic medication or insulin injection
Any current or previous diagnosis of diabetes (type 1 or type 2)
Current daily use of any supplement containing the herbs in the study supplement
Known allergies to any substance in the study supplement
Current daily tobacco smoker
Currently pregnant or breastfeeding, or planning to become pregnant in the next 12 weeks
Myocardial infarction, vascular surgery, or stroke in the past year
Refusal to provide consent for the study