This way of decaffeinating tea at home though, could remove up to 80 % of the caffeine in your drink which multiplied a couple of times a day adds up to quite a lot. (cantillonkitchen.com)
Studies using decaffeinated tea did not result in any change in body weight, BMI, or measurements. (flippingfifty.com)
Anywhere from 50 - 80 % of the caffeine will leech into the water leaving truly naturally decaffeinated tea leaves. (kombuchakamp.com)