Edit: Hemp-derived Delta 8 THC was legal until 8/21/20 thanks to the 2018 Farm Bill

The fuss about THC has always been aboutΔ9 (delta 9) THC.  It’s responsible for the high in marijuana.   Δ8(delta 8) THC is a very similar molecule that is present only in small quantities in most cannabis. Resourceful chemists have recently found a way to create Δ8THC from hemp.  

What is THCA?

THCA is a non-intoxicating cannabinoid found in high levels in the marijuana form of the cannabis plant. Smaller quantities are often also found in the hemp form of cannabis. In the U.S. hemp is defined as any cannabis containing over 0.3% delta-9 THC. The THCA content doesn’t count (according to most interpretations of the 2018 Farm Bill). In the E.U. hemp must have 0.2% delta 9 THC or less.