Liver is a metabolic organ and it is responsible for detoxification of various materials. Harmful metabolic materials produced in other organs can affect itindirectly. Liver contains proteins and enzymes with large antioxidant capacities.It is assumed that oxidative stress that is caused by reactive oxygen species(ROS) causes various liver damages.Medicinal plants and other medicines derived from them have been known as important sources of medicine by humans since ancient times. Nowadays, ease of access to these drugs has caused the researchers to focus on their use strongly and investigatetheir medicinal properties. Teasel has steroid Saponins that act as natural Testosterone boosters. Teasel increases Testosterone by increasing Luteinizing hormone (LH). In the current study, low doses of Teasel have been unable to reduce the increase of the liver enzymes which are produced in response to resistance training, but doses of 10 and 15 mg/kg have been able to do it well.