Little Exercise, Big Effects: Reversing Aging 
For what it's worth, cannabis also prevents neuroinflammation, even in extremely low doses:http://www.youtube.com/watch?v=2uVXs6CY2pshttp://www.freedomtoexhale.com/clinical.pdfThe endocannabinoid system seems to be the main mechanism our bodies use to naturally regulate inflammation. My understanding is that there is a growing belief among cannabinoid researchers that our cannabinoid receptors can get blocked as we get older, and so there may be a need to either supplement with phytocannabinoids and/or employ various techniques to unmethylate our CB1 receptors. There are a number of folks doing pre-clinical research on cannabinoids as potential treatments for alzheimers and other inflammatory / autoimmune diseases using various cannabinoids.Here is a cool paper about how colorectal cancer seems to result from the CB1 receptors being knocked out:http://www.drugs.com/clinical_trials/turned-off-cannabinoid-...It's possible that most cancers result from the same mechanism, although we don't really know yet. What we do know is that regular marijuana users have a 62% lower chance of head and neck cancers, and that there are an enormous amount of studies showing that cannabinoids can promote both apoptosis (cell death) in cancer cells and are anti-angiogenic, meaning they cut off the blood flow to the tumors.