JUUL Side Effects: What Are the Health Risks? Vaping Awareness Somerville Public Schools Approximately 16,000 unique flavours have been identified for vapes, many of which appeal to potential users. Some flavours increase the toxicity of vape emissions and can generate compounds that are known to 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. JUUL Pod Ingredients: What's in E Cigarettes? This statement is common, but it is not true! According to the manufacturer, a single JUUL pod contains as much nicotine as a pack of 20 regular cigarettes!