The Real Risk of Buying Medical Marijuana Online

Many people buy medical marijuana online — but they may not always get exactly what they pay for, according to new research.

A study, published this week in JAMA, found that nearly 70% of all products sold online made from cannabidiol — an extract of the marijuana plant also known as CBD — contained either higher or lower concentrations of the drug than indicated on the label. That could potentially mean those CBD products are ineffective or even dangerous.