Green tea contains more catechins but less caffeine than black tea. (Photo by Kanko*)
This past week I've been drinking green tea to see whether it's a useful way to control appetite while fasting intermittently. Before that, I tested black tea, which proved to be a decent choice when only slightly hungry but a bad choice when really hungry.
The results are pretty similar with green tea. There does seem to be a slight effect of reducing the feeling of hunger, but if I drink large amounts a few hours before breaking the 24 hour fast, I feel tired, shaky and unable to do pretty much anything. Even water would be a better option at that point, but a few hours into the fast green tea is quite nice and refreshing.
The appetite reducing effect could be due to the caffeine content in green tea - though it's less than in black tea or coffee - or it could something spesifical to green tea. To resolve the question once and for all, I'm going to try and find decaffeinated green tea and compare the two.
For more information on tea and fasting, see these posts:
Controlling Hunger During a Fast: Does Black Tea Help?
Controlling Hunger During a Fast: Does Decaffeinated Tea Help?
Controlling Hunger During a Fast: Does Coffee Help?
The Psychological Effects of Intermittent Fasting