Haha, grandma knows best! Actually, I wouldn't claim cinnamon was efficacious by any means, I started using it a while back merely as a flavor additive, and after reading the pretty large collection of science supporting its glucose modulating effects, I continued using it.
Kevin T swears that drinking Vinegar will save your life, regrow your hair, and cook breakfast for you too though

A hundred years from now, we'll have myostatin inhibitors and muscle tissue specific SARMs, and everyone will be able to walk around making Branch Warren look like Pee Wee Herman. Someone will come across an archived version of this forum, and have a good laugh with their pal when they see us having a discussion about a possible 21-30% modified drop in blood glucose levels and gastric emptying following cinnamon ingestion.