At the intersection of the $4 trillion wellness-industrial complex, the $17 billion legal cannabis industry, and the anxiety epidemic crippling America sits a little bottle of CBD oil. To some, it's a radical cure with massive, untapped potential. To others, it's snake oil. But CBD's popularity is only growing: by 2022, analysts estimate CBD will be a $20 billion industry. Here's everything you need to know about the latest gold rush.
Sidney Sue Howard for Quartz