In the early 1990s, the average THC content in confiscated cannabis samples was roughly 3.7 percent for marijuana and 7.5 percent for sinsemilla (a higher potency marijuana from specially tended female plants). In 2013, it was 9.6 percent for marijuana and 16 percent for sinsemilla.
Parkinson's Disease. For many people with Parkinson's disease, fatigue is just as disabling and unpleasant a symptom as the motor slowing or the trembling. Fatigue undermines all kinds of daily activities and rehabilitation programs. It feeds into our emotional reactions to Parkinson's symptoms and makes them all the harder to bear.
Then bone and muscle degeneration because parkinson's is a movement disorder and lack of training is a problem. PD itself e.g. would not cause death. Patients can live quite ...ehm well with it for 20 years (seen it myself...). Its just all what comes along with it which tends to kill the patient, I think.