Is green tea more of a diuretic than black tea?

Yes, green tea is more of a diuretic than black tea. Both green and black tea contain caffeine, which is a stimulant that can increase urine output. However, green tea also contains other compounds, such as polyphenols, that have been shown to have diuretic effects. One study found that drinking green tea increased urine output by 24%, while drinking black tea had no significant effect.