Cinnamon: I don't prescribe cinnamon for weight loss routinely. However i DO prescribe cinnamon for diabetics. Cinnamon assists in the utilization of glucose, so for diabetics, some studies indicate cinnamon is a beneficial herb. 

On the other side of things, cinnamon is considered a relatively safe herb.  If anyone is taking diabetic medication and planning on taking cinnamon for 3 months, then they should check their sugar levels frequently until they know how their body will react to cinnamon. 

My personal experience is that cinnamon is not a strong reducer of blood glucose levels. 

There are many more important nutrients and herbs one could take for weight loss as best therapy is really multi modality, especially for permanence. See www.GoldenWeightLossProgram.com or soon to be relocated  www.MedicalHCGWeightLossProgram.com where you can see that I use initially about 22 products for weight loss and gaining health.  I have never seen a better program for weight loss than this. Rate of weight loss is variable, depends on how the weight is coming off and are you gaining health and empowerment along with the process.  Dr. Laursen