COLUMBUS, Ohio — State marijuana regulators are changing the definition of THC — the psychoactive substance in the drug that produces a “high” — to include more cannabinoids, including those traditionally found in hemp. The new rule, which goes into effect May 2, defines THC in medical marijuana products as including but not limited to delta-1, delta-3, delta-4, delta-6, delta-8, delta-10 and of course delta-9.  Read the article here.