Cinnamon
Foods
Short answer
Cinnamon flavours food. Certain Ceylon cinnamon bark products have also been used traditionally to ease mild stomach cramps, bloating and mild diarrhoea. That is not proven for every jar of cinnamon. Replacing fluid is the first step for diarrhoea; sustained high cassia intake can also mean more coumarin. [3][2]
A flavouring spice; specific Ceylon bark products have traditional uses for mild cramps, bloating and diarrhoea.
Checked against sources; not clinician-reviewed. Not personal medical advice. Read the disclaimer
Updated: 2026-10-08
What is cinnamon useful for?
- Mild cramps and bloating: Ceylon cinnamon bark as tea or certain liquid preparations is traditionally used for relief. Traditional use does not guarantee a benefit for you. [3]
- Mild diarrhoea: Ceylon bark tea also has this traditional use. Replace lost fluid first; blood or recurrent diarrhoea needs care. [3]
- Seasoning: add cinnamon to porridge or fruit; kitchen seasoning is not a medicinal preparation. EMA's Ceylon assessment does not automatically apply to cassia. [3]
- Blood sugar and coumarin: diabetes results are mixed, and much cassia over time can increase coumarin exposure. [1][2]
What about blood sugar and weight?Research and background
Studies of cinnamon supplements in type 2 diabetes differ in species, amount and duration; some do not even identify the species. Findings for blood glucose and HbA1c, a longer-term glucose marker, are inconsistent. A reliable treatment effect is not established. A capsule trial cannot tell you what a sprinkle on breakfast will do. Evidence for cinnamon supplements as a weight-loss treatment is also insufficient. [1]
How can you use it in food?
Use cinnamon to taste in food. For mild gut complaints EMA documents traditional use of Ceylon bark tea or specific liquid products; preparations and schedules differ. Cassia, seasoning and essential oil cannot borrow that indication. Replace fluids first with diarrhoea. Follow the leaflet of any registered product, not a recipe for a different preparation. [3]
Why does coumarin matter?
Replace lost fluids first with diarrhoea. Seek care for blood, recurrent or worsening diarrhoea, or if it persists beyond two days; seek advice when other mild gut symptoms persist beyond two weeks. The monograph concerns medicinal use in adults: under 18 and in pregnancy or breastfeeding, it is not recommended for lack of safety data. Avoid Ceylon bark products with cinnamon or Peru balsam allergy. Sustained high cassia intake may expose sensitive livers to coumarin; BfR's long-term coumarin limit is not a cinnamon dose in teaspoons. Ordinary food seasoning is different from a medicinal course. [3][2]
What type is on the label?
Cinnamon is bark from several Cinnamomum trees. Ceylon cinnamon (C. verum) usually contains less coumarin than cassia. Ground powder’s colour or smell cannot tell you its coumarin content. If you use large amounts regularly, check the species and product information; an extract may be more concentrated or contain other ingredients. [1][2]
A practical choice with illness or medication
For everyday flavouring you usually need no supplement. With liver disease, pregnancy or medication, ask a clinician or pharmacist before sustained use of high-strength products. Keep following your diabetes plan; do not adjust a prescription after a single home glucose reading. Cinnamon oil on the skin is a different exposure and may irritate. [1][2]
Frequently asked questions
Can cinnamon help with diabetes?
Supplement studies do not establish a reliable treatment benefit. A sprinkle on food cannot replace medicine or an individual care plan. [1]
Why choose between cassia and Ceylon?
Is cinnamon every day dangerous?
Normal culinary use differs from prolonged high intake. Coumarin levels vary: there is no single safe teaspoon allowance for everyone. [2]
Can cinnamon help with bloating or diarrhoea?
Ceylon bark tea has a traditional use for both; particular liquid products are used only for mild cramps and bloating. Rehydrate first with diarrhoea. If it lasts more than two days, seek assessment. [3]
Can I take cinnamon with medicines?
Food seasoning differs from high-dose extracts. If taking medicines, pregnant or living with liver disease, check before regular concentrated use. [1]
Research and sourcesEvidence overview, methods and complete source list
What has been studied?
Particular Ceylon cinnamon bark products have traditional uses for mild cramps, bloating and mild diarrhoea; seasoning food is different.
Finding: Some supplement studies reported changes and others did not; products and doses differ. No reliable diabetes treatment follows, nor does a capsule result apply to food seasoning.
Cinnamon and blood sugar
Evidence: NCCIH summary of human studies; clinical benefit for diabetes remains unclear.
Studied population: Type 2 diabetes participants in heterogeneous supplement studies.
Form or context: Varying cinnamon supplements/species; not culinary cinnamon.
Uncertainty: Preparations and populations differ; no universal dose or response.
Sources: Cinnamon: Usefulness and Safety
Finding: EMA records traditional Ceylon bark tea use for mild cramps, gas and mild diarrhoea; specific liquid products only for the first two. Not proof for cassia or a cure.
Traditional relief for mild gut symptoms
Evidence: EMA traditional-use monograph, not clinically established efficacy.
Studied population: Adults with mild gut symptoms; rehydrate with diarrhoea.
Form or context: Ceylon bark tea for both; specified liquid products only for cramps/bloating.
Uncertainty: Traditional use; cannot transfer to cassia, culinary doses or serious/persistent symptoms.
Sources: Community herbal monograph on Cinnamomum verum J. S. Presl, cortex
Safety: Rehydrate first with diarrhoea; seek care for blood or symptoms beyond two days. Medicinal use under 18 or in pregnancy/breastfeeding is discouraged. Avoid with cinnamon or Peru balsam allergy; high cassia intake raises coumarin exposure.
Sources
- Cinnamon: Usefulness and Safety · National Center for Complementary and Integrative Health · 2024 · Public health information
- FAQ on coumarin in cinnamon and other foods · German Federal Institute for Risk Assessment (BfR) · Public health information
- Community herbal monograph on Cinnamomum verum J. S. Presl, cortex · European Medicines Agency / HMPC · 2011 · Regulatory assessment