The decision to declassify marijuana as a schedule 1 drug has been supposedly held up due to a lack of good data regarding the health implications. (Of course for years the federal government did not allow marijuana to be grown so any testing has been difficult.) But a recent 20-year study in New Zealand may give our government the data it needs: “After controlling for a number of factors, including tobacco use, childhood health, and childhood socioeconomic status, researchers’ 20-year study came to an interesting conclusion — namely, that marijuana use only had a statistically significant adverse impact on periodontal health. In other words, marijuana had no negative impact on a dozen other health factors, including lung function, systemic inflammation, BMI, or metabolic health. ” Read the whole story here.