From 1850s to 1930s cannabis started to grow famous for recreational purposes. As the intake of this drug increased over time, The Controlled Substances Act of 1970 classified it as a Scheduled 1 Drug. So naturally controversies aroused surrounding the medical use of marijuana.
To make it more medical-friendly, its active ingredient THC was synthesized in 1966, and finally approved by the U.S. Food and Drug Administration in 1985.
A 1999 a U.S. Government sponsored study by the Institute of Medicine uncovered the beneficial properties of marijuana in certain medical conditions such as nausea caused by chemotherapy, and wasting caused by AIDS. Since 1999, a number of studies have been done to show that smoked marijuana has pain reducing effects.
In 1996, California became the first state to legalize the use of marijuana for medical objectives, and about 24 of the states now have some sort of medical marijuana legislation.
Medical benefits of marijuana
You will be surprised to know why studies have been done on this herb, and for your favor, here is the list of 20 medical benefits of marijuana you probably never knew!
1. Slow and stop cancer cells from spreading
It was found in the study, published in the journal Molecular Cancer Therapeutics, that Cannabidiol has the ability to stop cancer by turning off a gene called Id-1.  In 2007, researchers at California Pacific Medical Center in San Francisco, reported that CBD may prevent cancer from spreading. The researchers experimented on breast cancer cells in the lab that had high level of Id-1, and treated them with cannabidiol.
The outcome was rather positive, the cells had decreased Id-1 expression, and were less aggressive spreaders. In fact, the American Association for Cancer Research has found that marijuana actually works to slow down tumor growth in brain, breast, and lungs considerately.