Formulations:

Powder, stick, and tablets.

Range of dosages studied:

0.1 to 14 grams per day (g/day).

Effective Dosages:

Glycemic control (including blood glucose and HbA1c)

Adults: Due to a lack of dose-response studies and variable findings from meta-regression studies, the precise effective dosage for improving glycemic control is uncertain, but it might be approximately 2 to 4 grams/day.^{[1][2][3][4][5]}

Special considerations: It is unclear whether cinnamon should be taken with food or not, because the efficacy of cinnamon on glycemic control has not been thoroughly examined in the presence vs. the absence of food.

Blood lipids (including triglycerides, LDL, and total cholesterol)

Adults: Due to a lack of dose-response studies and variable findings from meta-regression studies, the precise effective dosage for improving blood pressure is uncertain, but it might be approximately 1 to 6 grams/day.^{[6][7][8][9][10][11]}

Special considerations: It is unclear whether cinnamon should be taken with food or not, because the efficacy of cinnamon on blood lipids has not been thoroughly examined in the presence vs. the absence of food.

Blood pressure

Adults: Due to a lack of dose-response studies and variable findings from meta-regression studies, the precise effective dosage for improving blood pressure is uncertain, but it might be less than or equal to 2 grams/day.^[12][13][14]

Special considerations: It is unclear whether cinnamon should be taken with food or not, because the efficacy of cinnamon on blood pressure has not been thoroughly examined in the presence vs. the absence of food.

Inflammation and oxidative stress

Adults: Due to a lack of dose-response studies and variable findings from meta-regression studies, the precise effective dosage for improving blood pressure is uncertain, but it might be approximately 1 to 3 grams/day.^[15][16][6]

Special considerations: It is unclear whether cinnamon should be taken with food or not, because the efficacy of cinnamon on blood pressure has not been thoroughly examined in the presence vs. the absence of food.

Other Considerations:

Because of its coumarin content, cinnamon has the potential to interact negatively with blood-thinning medications and hepatotoxic drugs. See What are cinnamon’s main drawbacks? for further details.