Caffeine in Drinks

Tea (Oolong)

Oolong tea is a type of tea made from the Camellia sinensis plant where the tea leaves are withered and oxidized by sunlight, which causes them to twist or curl.

The Chinese word for Oolong tea means "black dragon tea" and it comes in 2 different styles.

In 2005, the Journal of Food Science published a large test of several varieties of Oolong tea. They discovered varying levels of caffeine.

Oolong Tea Brand Size (fl.oz. using 2g tea) Caffeine
Pu-erh Oolong (Stash) 8 41.6 mg
Tea Ren Oolong 8 16.6 mg
China Oolong (Stash) 8 33.4 mg
Exotica Champagne Oolong (Stash) 8 55.4 mg

Depending on the brand/variety chosen, Oolong tea can range from just 16.6 mg/cup to 55.4 mg/cup.

We took the average of the 4 types listed above and used this number for an overall caffeine amount.

In general, expect Oolong tea to have more caffeine than green tea but less caffeine than black tea.

Oolong tea became more popular a few years ago since it was promoted as a weight loss beverage. However, this hasn't been proven and is likely no better for weight loss than drinking green or black tea.

Ingredients in Tea (Oolong)

Leaves From The camellia Sinensis Plant.

Is Tea (Oolong) high in caffeine?

Tea (Oolong) contains 4.62 mg of caffeine per fl oz (15.64 mg per 100 ml). A 8 fl oz cup has a total of 37 mg of caffeine.

Total Caffeine (mg)


Friedman, M., Kim, S. Y., Lee, S. J., Han, G. P., Han, J. S., Lee, K. R., & Kozukue, N. (2005). Distribution of catechins, theaflavins, caffeine, and theobromine in 77 teas consumed in the United States. Journal of food science, 70(9), C550-C559. See other references.