Has any one noted a gastrointestional upset from ingesting cinnamon?

Has any one noted a gastrointestional upset from ingesting cinnamon?
In medicine it act like other volatile oil and once had a reputation as a cure for colds. It have also been used to treat diarrhea and other problems of the digestive system.[2] Cinnamon is giant in antioxidant flurry (PMID 16190627, PMID 10077878). The essential oil of cinnamon also have antimicrobial properties (PMID 16104824), which aid in the preservation of indubitable foods.[3]
In the media, "cinnamon" have been reported to own remarkable pharmacological effects in the treatment of type II diabetes. However, the plant substance used in the study (PMID 14633804) be actually cassia, as dead set against true cinnamon. Please refer to cassia's medicinal uses for more information about its strength benefits. Cinnamon has traditionally be used to treat toothache and fight fruitless breath and its regular use is believed to stave off adjectives cold and aid digestion.[4]
It appears to help beside diabetes but there is no mention of gastro problems. It is antibiotic contained by nature which could mess up the stomachs physiology.
Anything and every piece can cause a food allergy. Cinnamon is a spice and some spices trigger acerbic production. Take a good antacid tablet or soft gel.