It is known that when CB1 comes into contact with cannabis it has an impact on bone regeneration, but until now it was not clear whether the drug had a positive or negative effect.

已经知道CB1和大麻接触后将对骨再生产生影响，但尚未清楚它是正效应还是负效应。

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This drug can also make the user feel nervous or even paranoid. Some people who use cannabis feel hungry after using and describe getting the "munchies."

当叶子被用了，他会产生一个放松和想睡的感觉。叶子也会让使用者感觉到紧张甚至多疑，偏执。

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He said the findings would impact on drug policies, because they suggested reducing or eliminating the availability of cannabis would be "unlikely to make a dent" in the hard drug problem.

BBC: Cannabis 'not linked to harder drugs'

Marjorie Wallace, Chief Executive of the mental health charity Sane, said she hoped the advisory body would consider "mounting research linking cannabis to the increase in drug-induced psychosis".

BBC: NEWS | UK | Police chief firm over drug law

He also wrote that since the downgrading of cannabis there had been no proven increase in use of the drug.

BBC: NEWS | UK | Police chief firm over drug law