Marijuana is the most commonly used illicit drug in the United States. It is estimated that 50% of American teenagers have tried marijuana for the first time before they graduate from high school. The main culprit of marijuana’s harmful health effects boils down to THC. THC, which stands for tetrahydrocannabinol, elicits psychological effects when binding with the receptors on nerve cells and fits like a lock. These receptors are commonly found in particular regions of the brain associated with memory, pleasure, and thinking. This article runs down the effects of marijuana on brain performance and how chronic use of the drug affects the individual’s everyday life. Overview on Marijuana Street names: pot, weed, herb. Marijuana is made from Cannabis sativa, a hemp plant. People can take up marijuana through the smoke of the plant’s seeds, flowers, stems, and dried leaves, although marijuana can now be mixed into food. At present, marijuana can be brewed as a tea, and controversiall...