Does green tea break a fast?

A 240 ml (8 fl oz) cup of green tea brewed in water has about 2 kcal, no sugar and almost no protein. USDA data list 1 kcal per 100 ml. On the four goals this site uses to sort answers, plain green tea is safe for weight loss, blood sugar, autophagy and gut rest. Decaffeinated green tea gets the same verdicts and has no caffeine at all.

Matcha is the whole tea leaf ground to a powder and whisked into water. Labels give 0 to about 7 kcal for a 2 g teaspoon, with no sugar. That is far below the common 50-calorie rule of thumb, which is not an official limit, so matcha made with water stays safe. A matcha latte is a milk drink, and the milk protein breaks a fast for autophagy and gut rest.

Green tea is often said to boost fat burning. A review of several human trials looked at adults with overweight or obesity. Green tea preparations led to a weight loss too small to matter clinically. Drink green tea during a fast for the taste and the fluid. The trials give no reason to expect faster weight loss from it.

A cup of green tea has about 29 mg of caffeine, well under the 47 mg in a cup of black tea. If you are pregnant or breastfeeding, the caffeine limit is 200 mg a day, about seven cups of green tea. Talk to a doctor before you fast. If you take levothyroxine, take it as prescribed, on an empty stomach 30 to 60 minutes before breakfast and before any tea or coffee. Honey changes the answer completely, since a tablespoon is about 64 kcal of sugar and breaks a fast for every goal.