Cannabis Varieties and strains

Cannabis Variety and Strains CBD is a 5-HT1A receptor agonist, which is under laboratory research to determine if it has an anxiolytic effect.[149]

 It is often claimed that sativa strains provide a more stimulating psychoactive high while indica strains are more sedating with a body high.[150]

 However, this is disputed by researchers.[151]

Psychoactive ingredients

According to the United Nations Office on Drugs and Crime (UNODC),

 The three main forms of cannabis products are the flower/fruit, resin (hashish), and oil (hash oil).

The UNODC states that cannabis often contains 5% THC content, resin “can contain up to 20% THC content”,

That “Cannabis oil may contain more than 60% THC content.”[152]

A 2012 review found that the THC content in marijuana had increased worldwide from 1970 to 2009.[153] It is unclear, however, whether the increase in THC content has caused people to consume more THC or if users adjust based on the potency of the cannabis. It is likely that the higher THC content allows people to ingest less tar.

At the same time, CBD levels in seized samples have lowered, in part because of the desire to produce higher THC levels and because more illegal growers cultivate indoors using artificial lights.

This helps avoid detection but reduces the CBD production of the plant.[154]

Australia’s National Cannabis Prevention and Information Centre (NCPIC) states that the buds (infructescences) of the female cannabis plant contain the highest concentration of THC, followed by the leaves.

In addition to The stalks and seeds have “much lower THC levels”.[155] 

The UN states that the leaves can contain ten times less THC than the buds, and the stalks.

After revised cannabis scheduling in the UK, the government moved cannabis from a class C to a class B drug.

A purported reason was the appearance of high potency cannabis. They believe skunk accounts for between 70 and 80% of samples seized by police[156] 

 Extracts such as hashish and hash oil typically contain more THC than high potency cannabis infructescences.[159]