May 24, 2016

Cinnamon Bark

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How does Cinnamon Bark work?

The oils found in cinnamon bark are thought to reduce spasms, reduce gas (flatulence), and stimulate the appetite. Cinnamon might also increase blood flow. Cinnamon bark also contains a chemical that might work like insulin to lower blood sugar. However, these effects are thought to be fairly weak.

There are also ingredients in cinnamon bark called tannins that might help wounds by acting as an astringent, and also prevent diarrhea.

Are there safety concerns?

Consuming cinnamon bark in food amounts is LIKELY SAFE. Cinnamon bark is POSSIBLY SAFE for most people when taken by mouth in amounts used for medicine. These amounts are slightly higher than amounts found in food. However, cinnamon bark is POSSIBLY UNSAFE when taken by mouth in large amounts. Also, taking cinnamon oil by mouth is POSSIBLY UNSAFE. The oil can be irritating to the skin and mucous membranes, including the stomach, intestine, and urinary tract. It can cause side effects such as diarrhea, vomiting, dizziness, drowsiness, and others.

Special Precautions & Warnings:

Pregnancy and breast-feeding: Consuming cinnamon bark is LIKELY SAFE when taken in food amounts during pregnancy and breast-feeding. Do not take larger amounts of cinnamon bark if you are pregnant or breast-feeding. Not enough is known about the safety of taking larger amounts.

Diabetes: Cinnamon bark might lower blood sugar in people with type 2 diabetes. Watch for signs of low blood sugar (hypoglycemia) and monitor your blood sugar carefully if you have diabetes and use cinnamon bark.

Surgery: Cinnamon bark can affect blood sugar levels and might interfere with blood sugar control during and after surgery. Stop taking cinnamon at least 2 weeks before a scheduled surgery.


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You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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