Broad-spectrum CBD contains other components of the cannabis plant, but it's free from THC. Full-spectrum CBD tinctures, by contrast, contain other cannabis plant components that include trace amounts of THC (federally legal full-spectrum CBD products have THC levels not in excess of 0.3%). Your sensitivity to the THC in a full-spectrum CBD oil is likely to be a determining factor in whether it's for you. It's also possible to find CBD isolates that contain only cannabidiol, with no other cannabis compounds.