How much cinnamon can I have while fasting?

A sprinkle, up to about a teaspoon, is fine and will not break your fast.

Does cinnamon in coffee break a fast?

No, a pinch of plain cinnamon in black coffee is fast-safe.

Does cinnamon lower blood sugar?

It may modestly improve insulin sensitivity, and a small amount does not break a fast.

Are cinnamon supplements okay while fasting?

Plain capsules with no added sugar are generally fine; check for fillers.

Does Cinnamon Break a Fast?

Reviewed by the FastTrack team · Updated June 2026

Short answer: No

A sprinkle of cinnamon does not break a fast. The small amount used to flavor coffee or water has negligible calories and may even help steady blood sugar.

Calories	~3 kcal per tsp
Breaks a weight-loss fast?	No
Breaks ketosis?	No
Breaks autophagy?	No
Insulin impact	Minimal, may help

Why cinnamon is fast-safe

A teaspoon of ground cinnamon has only about three calories and a trace of carbohydrate, which is not enough to raise insulin or break a fast. Some studies suggest cinnamon can modestly improve insulin sensitivity, which is why people add a pinch to fasting-friendly drinks.

Plain cinnamon, not cinnamon products

Ground cinnamon and cinnamon sticks are fine in small amounts. Cinnamon-flavored syrups, sweetened cinnamon drinks, and pastries are not, because the sugar and calories they carry break a fast.

How much is safe

A sprinkle, up to about a teaspoon, is fine in coffee, tea, or water and will not break your fast.

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Frequently asked questions

How much cinnamon can I have while fasting?: A sprinkle, up to about a teaspoon, is fine and will not break your fast.
Does cinnamon in coffee break a fast?: No, a pinch of plain cinnamon in black coffee is fast-safe.
Does cinnamon lower blood sugar?: It may modestly improve insulin sensitivity, and a small amount does not break a fast.
Are cinnamon supplements okay while fasting?: Plain capsules with no added sugar are generally fine; check for fillers.