Patients with diabetes have an increased frequency of oral candida and risk for candida (yeast) infection of the mouth.

This is related to altered metabolic control, neutrophil (white blood cell) dysfunction, reduced saliva flow and high blood glucose in the blood and saliva.

The higher glucose levels in the saliva of diabetic patient may be a risk factor for oral candida (yeast) overgrowth.

Cinnamon is an ancient medicinal extract that is also a spice that is commonly used in Asia due to its strong flavour.
Cinnamon has been found to have anti-inflammatory, antibacterial, and anti-oxidant as well as anti-fungal properties. Increased frequency of oral Candida (yeast) has been found in patients who have both diabetes and gum disease, with reservoirs in the check skin and on the tongue. Candida can aggregate with other bacteria in periodontal pockets and also invade the tissues surrounding the teeth.

More than 90 percent of fungus infections of humans involve the species Candida, and resistance to common anti-fungal drugs is emerging.

Cinnamon is a herbal product with much less side effects than conventional anti-fungal medications.

Cinnamon Plant Profile: The spice is derived from the brown bark, which forms quills with longitudinal striations. The plant is native to Sri Lanka, South eastern India, Indonesia, South America, and the West Indies.

Scientific Names: Cinnamomumzylinicum, Cinnamomum cassia, Cinnamomumzeylanicum, Cinnamomumloureirii
Common name(s): Cinnamon, Cinnamomon, Ceylon cinnamon, Chinese cinnamon, Chinese cassia, Saigon cinnamon

Gujjari et al studied the effect of a Cinnamon mouthwash on Candida (oral yeast) in diabetic patients with chronic periodontitis (gum disease). They found a significant reduction in candida using the Cinnamon mouthwash with most significant results in diabetic group with periodontitis.

So it appears that herbal extracts like cinnamon that have anti-fungal properties can work well to reduce oral candida with less side effects than conventional anti-fungals and herbal extracts could help disrupt the bacterial biofilm that is responsible for the progression of gum disease.

For more info refer to : Gujjari et al 2017 EVALUATION OF CINNAMON MOUTHWASH ON CANDIDA ALBICANS IN TYPE II DIABETICS WITH CHRONIC PERIODONTITIS: A PILOT STUDY. International Journal of Information Research and Review. Vol. 04, Issue, 04, pp.3937-3940, April, 2017

https://www.ijirr.com/sites/default/files/issues-pdf/1907.pdf?fbclid=IwAR1NZyF1dJcMszC5DfP7OBiGiDJYgzwRUu_-YFpsvIPcFrEN31wUGgHUJQQ