Does herbal tea break a fast?

No. Chamomile, peppermint, rooibos, ginger and hibiscus teas brewed with water have almost no calories and keep your fast.

Does black tea break a fast?

Plain black tea does not. A splash of milk adds 10 to 20 calories, which matters little for weight loss but ends a strict fast.

Does matcha break a fast?

Plain matcha whisked with water has about 5 to 10 calories per serving and is fine for most fasts. A matcha latte with milk and syrup is a meal-sized drink.

Can tea help with hunger while fasting?

It can. A warm drink and a little caffeine blunt hunger for many people, though the effect is modest and varies.

Does Tea Break a Fast? No

Reviewed by the FastTrack team · Updated June 2026

Short answer: No

Plain tea does not break a fast. A cup of black, green, white or herbal tea brewed with water has about 2 calories, too little to affect insulin, ketosis or autophagy. Milk, sugar, honey and bottled sweet teas are what break it.

Calories	~2 kcal per cup (plain)
Breaks a weight-loss fast?	No
Breaks ketosis?	No
Breaks autophagy?	No
Insulin impact	Negligible

Why plain tea keeps you fasted

Tea leaves and herbs bring flavor, polyphenols and, in true teas, caffeine, but almost no energy. Brewed without additions, a mug carries a couple of calories, far below anything that would raise insulin. Many people find that a hot cup also takes the edge off hunger in the late morning, which makes a longer window easier.

What turns tea into food

Milk, cream, sugar and honey add calories, and dairy and sugar also bring an insulin response. Bottled sweet teas, chai lattes and bubble tea can carry 150 to 450 calories. Herbal blends with dried fruit pieces are still fine, since the fruit stays in the bag. Strong black or green tea on an empty stomach makes some people nauseous.

How much is safe

Several cups a day are fine for your fast. With caffeinated tea, keep your total caffeine reasonable and stop by mid-afternoon so it does not cut into the sleep that makes the next fast easier.

Track your fasts with confidence

FastTrack times your fasts, your eating window and your progress, with a plan built around your goals.

Get your free plan

Frequently asked questions

Does herbal tea break a fast?: No. Chamomile, peppermint, rooibos, ginger and hibiscus teas brewed with water have almost no calories and keep your fast.
Does black tea break a fast?: Plain black tea does not. A splash of milk adds 10 to 20 calories, which matters little for weight loss but ends a strict fast.
Does matcha break a fast?: Plain matcha whisked with water has about 5 to 10 calories per serving and is fine for most fasts. A matcha latte with milk and syrup is a meal-sized drink.
Can tea help with hunger while fasting?: It can. A warm drink and a little caffeine blunt hunger for many people, though the effect is modest and varies.