As of 2015, research is inconclusive about the medical benefits of taking cinnamon, according to WebMD. Some studies show it may reduce inflammation and cholesterol, fight bacteria and contain antioxidant properties. Cassia cinnamon is associated with lowering blood sugar in diabetics, while Ceylon cinnamon is thought to be less effective.
Cinnamon is primarily used as a spice; however, extracts from cinnamon tree bark are also used in certain medicine therapies throughout the world, states WebMD. The recommended dosage ranges from 1 to 6 grams per day. People who take medications such as antibiotics, blood thinners or heart medicines should consult a doctor before taking cinnamon supplements. Diabetics in particular may need to adjust their specific treatment due to the impact cinnamon has on blood sugar.
There are generally no side effects from taking cinnamon, which is an additive in a number of foods, explains WebMD. Heavy doses can irritate the mouth, lips and skin. Some people have an allergic reaction to it. Very high doses of Cassia cinnamon can be toxic in liver patients due to an ingredient called coumarin. Women who are pregnant or breastfeeding and children should not use cinnamon as a medical treatment until there is more evidence of its safety.