Although the type and amount may vary depending on the strain of marijuana, the two most common active ingredients found in most samples of marijuana are Tetrahydrocannabinol (THC) and Cannabidiol (CBD).
Marijuana has indeed been proven to have health benefit for patients suffering from a wide range of conditions. Marijuana has been shown to help mitigate certain conditions ranging from Parkinsons disease and epileptic seizures, to other, more psychological afflications, such as anxiety or even PTSD.
All available evidence suggests that vaporization is indeed a safer alternative to smoking medical marijuana, as it practically eliminates the standard risks posed by smoke inhalation. This form of consumption is growing in popularity among the medicinal marijuana community.