Marijuana's official designation as a Schedule 1 drug — something with "no accepted medical use" — means it is pretty tough to study.

Yet numerous anecdotal reports as well as some studies have linked marijuana with several purported health benefits, from pain relief to helping with certain forms of epilepsy.

Still, experts say more rigorous scientific analyses are needed. Use of marijuana, a psychoactive drug, can come with risks, especially in people who may be prone to addiction or mental illness. Take a look at how marijuana can affect your brain and body: