'Some weed plants with high levels of chemicals have been linked to psychosis'

Naked Scientist Chris Smith says there is evidence of considerable health consequences if marijuana is abused and that some plants bred for the drug industry have very high levels of chemicals including tetrahydrocannabinol (THC).

Smith says the mentioned chemical has been linked to people experiencing psychosis or schizophrenic type symptoms.

There is a link between people using marijuana and people developing these symptoms, but what we are not clear about at the moment is whether people use the marijuana because they developing one of these conditions and they using the marijuana to feel better or whether the marijuana triggers the condition but we do know there is that strong association.

Chris Smith, Naked Scientist

READ: 'We can barely enforce tobacco legislation, how will we to deal with dagga?'

There is also evidence that the use of marijuana does rewire the brain and people who are long term chronic users do suffer from a lack of motivation and reward.

Chris Smith, Naked Scientist

ALSO READ: ConCourt rules dagga legal for private use, but what is private?

You are smoking something, there is a lot of tar in marijuana, it is irritating to lung tissue and therefore may accelerate lung aging even beyond the effects of just the tobacco you are mixing it with. Smoking is always bad.

Chris Smith, Naked Scientist

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