2. Kombucha
Because is tea based, it makes sense that kombucha provides caffeine. “Kombucha is brewed from black or green tea, and these teas naturally have caffeine,” says Rubin. The average kombucha contains about 45 milligrams caffeine per 15-ounce serving, according to Caffeine Informer.
However, you might find higher amounts in certain offerings. For example, KeVita’s Master Brew Kombucha Citrus provides 68 milligrams per the same serving size.
“This is because it’s made with green tea extract,” says Rubin. “Kombucha is known for its possible benefits for gut health, but many people would not know the popular drink has a caffeine content equivalent to a 20-ounce green tea.”