Concern is growing about synthetic cannabinoids found in THC vapes stronger, riskier, and unpredictable. These substances sometimes called fake weed have been linked to seizures, paranoia and even Toxic metal particles can be present in cannabis vapes even before the first use American Chemical Society Committee Blog: Regulations in the Inhalable Cannabis Space A Call for Sensible Flavor Regulation for Cannabis Vapes Do Weed Vape Pens Smell Like Weed? Essential Facts Spiritleaf Ancaster Cannabis Dispensary Do Cannabis Vapes Contain More Chemicals Than Users Expect? Young Adults Mix Cannabis with Nicotine, Tobacco RT