Harmful Effects of Vaping Chart Health Edco HHC now illegal in Ireland: What Employers need to know Randox Testing Services It's easy to buy 'weed' like HHC, even where marijuana's illegal Vaping releases toxic chemicals, including heavy metals, as well as ultrafine particles that go deep into the lungs. These increase the risk of heart and lung disorders. Vaping: Understanding the Risks and Impacts on Health Preliminary pharmacokinetic and psychophysical investigations after controlled oral and inhalative consumption of hexahydrocannabinol (HHC) Scientific Reports