Clinical trial daily epigallocatechin 3-0 gallate (EGCG) dosage is 9 mg per kilogram of body weight¹ per day, where the EGCG content of Greenselect® is 13%.
Green tea extract has a relatively short half life² (3.4 ± 0.3 h): dosage twice a day.

ECGC dosage: mg/day
Source   Swanson     Vitacost  
Capsules/Bottle  60 90
Capsule (mg) 600 300
Supply (Days)


Swanson Ultra
GreenSelect® Green Tea Phytosome – 60 caps, 600 mg: US$28.95 plus shipping
GreenSelect® Green Tea Extract Phytosome – 90 caps, 300 mg: US$13.99 plus shipping