Cannabis and Head and Neck Squamous Cell Carcinoma

Cannabis and Head and Neck Squamous Cell Carcinoma: "We found that moderate marijuana use was significantly associated with reduced risk of HNSCC [head and neck squamous cell carcinoma]. This association was consistent across different measures of marijuana use (marijuana use status, duration, and frequency of use). Diminished risk of HNSCC did not differ across tumor sites, or by HPV [human papillomavirus] 16 antibody status.

Average Potency of Seized Cannabis in the UK, 2008

Average Potency of Seized Cannabis in the UK, 2008:
"• Twenty-three Police Forces in England and Wales participated in the study. Forces were requested to submit samples confiscated from street-level users. In early 2008, they submitted 2,921 samples for analysis to either the Forensic Science Service Ltd (FSS) or LGC Forensics at Culham (LGC F).
"• Initial laboratory examination showed that 80.8% were herbal cannabis and 15.3% were cannabis resin. The remaining 3.9% were either indeterminate or not cannabis.

Trends in Cannabis Potency in the US, 1980-1995

Trends in Cannabis Potency in the US, 1980-1995: "Data on the THC content of cannabis products in the USA have been collected by ElSohly et al. (1984, 2000) for many years as part of the University of Mississippi Potency Monitoring Project. Samples were submitted by law enforcement agencies and it has to be assumed that they were representative of the market. Mean THC values are shown in Figure 16 for normal herbal cannabis, sinsemilla and resin.

The Cannabis Plant

"Cultivated Sinsemilla: Female cannabis plant which has not been pollinated. May grow from cutting or from seed. May contain some seed (if un-pollinated the seed will be sterile). Common illicit indoor grow technique.
"Cultivated Non Sinsemilla: Male or Female cannabis plant commonly grown for illicit drug use.
"Cultivated Ditchweed: Male or Female cannabis plant which grows wild in many states that has in some way been tended by man. Examples of tending are: weeding, watering, topping, fertilizing, harvesting.

THC Content

THC Content: "The secretion of THC is most abundant in the flowering heads and surrounding leaves. The amount of resin secreted is influenced by environmental conditions during growth (light, temperature and humidity), sex of the plant, and time of harvest. The THC content varies between parts of the plant: from 10-12 % in flowers, 1-2 % in leaves, 0.1-0.3 % in stalks, to less than 0.03 % in the roots."

NIDA Cannabis for Research

NIDA Cannabis for Research: "Under the current contract with the University of Mississippi for any given year NIDA [National Institute on Drug Abuse] has the option to grow either 1.5 or 6.5 acres of cannabis, or to not grow any at all, depending on research demand. Generally, 1.5 acres are grown in alternate years. The number of cannabis cigarettes produced from 1.5 acres is about 50,000-60,000, although it can be higher. Cigarettes are produced in three potencies: strength 1 - 3-4 %; strength 2 - 1.8-2.2 %; and strength 3 - placebo, as close to 0% as possible.

Estimated Risk of Arrest for Marijuana Possession

Estimated Risk of Arrest for Marijuana Possession: "To provide a sense of the intensity of enforcement, we calculated the risk a marijuana user faces of being arrested for possession. If calculated per joint consumed, the figure nationally is trivial—perhaps one arrest for every 11,000–12,000 joints.4 However, the relevant risk may be the probability of being arrested during a year of normal consumption. Since marijuana is mostly consumed by individuals who use it at least once a month,5 we estimated the risk that such individuals face.