Cinnamon Dosage: How Much to Take and How to Take It

There is no single dose of cinnamon: dosage depends heavily on the species chosen, Ceylon cinnamon or cassia cinnamon, the latter being richer in coumarin, a substance worth watching at high doses. The guidelines below are given for information only, in the spirit of what is presented in cinnamon review, and do not replace carefully reading the product label or asking for advice when in doubt.

The main forms available and their usual doses

Form	Indicative usual dose	Note
Culinary powder (Ceylon preferred)	1 to 2 g per day (about ½ teaspoon)	Ceylon is low in coumarin, safer for everyday use
Cassia powder (occasional use)	No more than about 1 g per day if used long term	Richer in coumarin, best kept to occasional use
Standardized extract (capsules)	500 mg to 1 g per day	Check the species and coumarin content stated on the label

What a clinical trial shows about dosage

A study published in 2003 by Khan and colleagues evaluated three doses of cassia cinnamon (1, 3 and 6 g per day) over 40 days in people with type 2 diabetes. All three doses showed a significant reduction in fasting blood glucose, cholesterol and triglycerides compared with the control group, with the 6 g per day dose showing the strongest glucose-lowering effect (see the study on Google Scholar). This study focuses specifically on cassia, which is richer in coumarin: it does not justify reproducing these high doses over the long term without medical supervision.

What time of day should it be taken?

Cinnamon fits naturally into meals, sprinkled on a dish, a hot drink or a sweet preparation. For a digestive or blood-sugar goal, splitting it into one or two doses with meals is more consistent than a single concentrated dose.

How long should a course last?

As detailed in our article cinnamon: how long to work, regular culinary use of Ceylon cinnamon can continue without any particular time limit. A targeted course based on cassia, on the other hand, is best kept to a few weeks, because of its coumarin content, before reassessment.

Should the dose be adjusted to the goal sought?

Moderate daily culinary use is enough for most purposes. For a more targeted blood-sugar goal, favor Ceylon cinnamon at a regular dose rather than increasing the cassia dose, whose coumarin content limits the safety margin at high doses used long term.

What to do in case of a mild side effect?

Mild mouth or digestive irritation is possible at high doses, particularly with cassia. Reducing the amount and favoring Ceylon generally restores comfort. Persistent discomfort should prompt stopping use and reporting it to a professional.

Precautions

Following the indicative doses does not remove the general precautions specific to this herb, detailed in cinnamon dangers: caution needed with diabetes or anticoagulant treatment, care during pregnancy beyond occasional culinary use. Cinnamon never replaces medical treatment. For general guidance, see our safety and precautions guide.