Toxic metal particles can be present in cannabis vapes even before the first use American Chemical Society 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 Do Cannabis Vapes Contain More Chemicals Than Users Expect? What are Cannabis Vapes? Bud and Mary's Young Adults Mix Cannabis with Nicotine, Tobacco RT Cannabis Vapes Boston Rooted In