You might have heard of HHC (hexahydrocannabinol) showing up in vapes, gummies, and herbal mixes. It can feel a bit like cannabis, but because it's unregulated the strength and risks E Cigarettes and Vaping OHSU You might have heard of HHC (hexahydrocannabinol) showing up in vapes, gummies, and herbal mixes. It can feel a bit like cannabis, but because it's unregulated the strength and risks HHC now illegal in Ireland: What Employers need to know Randox Testing Services Preliminary pharmacokinetic and psychophysical investigations after controlled oral and inhalative consumption of hexahydrocannabinol (HHC) Scientific Reports Technical report: Hexahydrocannabinol (HHC) and related substances