Many entrepreneurs are making big money from cannabidiol, more commonly known as CBD. The substance is one of more than 100 cannabinoids found in the cannabis plant and is thought to help treat a wide range of conditions including anxiety, insomnia, menstrual pain and dementia, among others, although other experts dispute this. Regardless, a rapidly growing industry, estimated to be worth $16 billion (£13bn) by 2025, has sprung up around CBD. Click through to meet the people who are making fortunes from the so-called "miracle cure-all".