Scientists investigating the effects of cannabis on bone health have found that its impact varies dramatically with age.

The daily consumption of cannabis predisposes to the appearance of psychosis and schizophrenia, and those episodes of psychosis which are fruit of this substance present certain specific characteristics, both before their appearance and in the clinical presentation of the psychosis.

Claims that a large increase in the strength of cannabis over the last decade is driving the occurrence of mental health and other problems for users are not borne out by a study of the worldwide literature, say researchers at the National Drug and Alcohol Research Centre (NDARC) and the National Drug Research Institute (NDRI), both from Australia.

Long-term, heavy cannabis use may be associated with structural abnormalities in areas of the brain known as the hippocampus and amygdala, according to a report in the June issue of Archives of General Psychiatry, one of the JAMA/Archives journals.

While this CAMH Monitor eReport reveals some promising substance use trends among Ontario adults, its revelation of a substantial increase in cannabis use raises a significant public health flag.

Researchers proved that smoking marijuana, like smoking tobacco, may increase a person's risk for gum disease that can lead to tooth loss.

New information published in the Journal of Applied Biobehavioral Research explores University students’ motivations for using or not using cannabis and found various factors that might encourage use.

Scientists in Britain have produced further evidence linking cannabis use to the possible development of psychosis later in life. The research, published in the medical journal The Lancet, indicates that although the risk remains low, users of cannabis are 40 per cent more likely to develop conditions such as schizophrenia.

A critical step in brain development is governed by endogenous cannabinoids, 'the brain's own marijuana'. Studies conducted at Swedish medical university Karolinska Institutet, with participation of scientists from Europe and the United States, are now published in Science and show that these endogenous molecules regulate how certain nerve cells recognize each other and form connections.