THCa or Tetrahydrocannabinolic acid, the acidic precursor of THC, is the latest innovation in the cannabis market. It’s the most prevalent cannabinoid in the cannabis plant. Though it doesn’t produce a high unless heated, on metabolization, it can convert to THC. Legal at the federal level post the 2018 Farm Bill, state laws may vary. It can be detected in urine tests, and it’s advised to verify the safety and quality of THCa products through comprehensive third-party testing.