hemp , believed to alleviate joint pains , mood disorders and even help animals lose weight .
there are a rising number of firms in the us that sell biscuits containing cannabidiol extracted from hemp .
two of the most common compounds are tetrahydrocannabinol -lrb- thc -rrb- - the psychoactive chemical that produces the cannabis high - cannabidiol -lrb- cbd -rrb- .