Attenuate does not work as a stimulant, it has a small amount of green tea but not enough to cause an increased heart rate or elevated blood pressure. Numerous clinical trials and studies have verified and documented Attenuate's safety. Attenuate should not be used by pregnant women or those who are breast feeding, or individuals younger than 16 years of age. Check with your doctor if you have a serious medical condition, or are under a physician's care before using Attenuate.