A Randomized, Double-Blind, Placebo-Controlled, Parallel Group Comparison Study on Improvements in Glucose Metabolism by Daily Ingestion of Products Containing Pinitol

INTERVENTION: Ingestion of three capsules containing pinitol daily for 12 weeks. Ingestion of three placebo capsules daily for 12 weeks. CONDITION: Healthy adults PRIMARY OUTCOME: HbA1c levels after 4, 8 and 12 weeks of ingestion and 4weeks after the end of ingestion. SECONDARY OUTCOME: Fasting blood glucose, glycoalbumin, insulin and HOMA‐IR INCLUSION CRITERIA: 1. Subjects whose FBG is>=100mg/dl and <126mg/dl or HbA1c >=5.6% and <6.5%. 2. Subjects who have relatively high HOMA‐IR levels (selected by the screening results). 3. Subjects who agree to participate in this study with a written informed consent.