Is there any caffeine in the product?

The green tea leaf does have caffeine which is important for its antioxidant and anti-inflammatory properties. The particular type of green tea used in the PureNaturalScience formulation contains, on average, 6.5% caffeine. A serving size of two tablets containing 75 mg of green tea extract delivers just under 5 mg of caffeine (compare to a typical cup of drip coffee at around 100 mg).The level of caffeine is insignificant from the aspect of feeling a “caffeine” effect. We were very careful in the formula to not impart any feeling that would make one feel jittery or hyper.