green tea how much caffeine
The study reviewed green tea extract products for which caffeine content was stated on the supplement label and products for which no caffeine information was provided. The study found that the caffeine content of green tea extract supplements with no specific label information ranged from 0.60 mg/day to 20.01 mg/day. Additionally, the study stated that products with specific label information about caffeine content ranged from 100 mg/day to 150 mg/day.