Marijuana is a poorly understood drug. In this episode Rand explains that marijuana is not the innocuous drug that it is often portrayed as. He illustrates the chemical changes that take place in the body with different levels of use and we learn that the drug has a definite and negative effect on brain function. Marijuana is a fat-soluble drug that becomes stored in the fat cells of the brain. The brain works by sending messages using neurotransmitters from inside one cell over to another cell. With heavy marijuana use, this process slows down resulting in boredom, memory loss, frustration and anger. It can take up to two years, for the THC to be completely out of your system.