A 12-week London study was recently conducted involving 58 type 2 diabetics with hemoglobin A1c (HbA1c) levels over 7 %. Hemoglobin A1c is a marker for long-term glycemic control in diabetics.
After 12 weeks on 2g of cinnamon per day, study subjects had significantly lower HbA1c levels, as well as significantly reduced blood pressures (systolic & diastolic).
Source: Diabetic Medicine: A Journal of the British Diabetic Association, October 2010