Aerosol Sci Technol 52(11):12191232 Cutler MJ, Jeyaraj D, Rosenbaum DS (2011) Cardiac electrical remodeling in health and disease
Donna Shelley, professor and vice dean for research at the New York University School of Global Public Health, said that while nicotine pouches don't cause the same health problems as products containing tobacco, she wouldn't call them "safe." "Some of the negative health effects of the nicotine pouches include gastrointestinal symptoms, like nausea, gum soreness and ulcers, and also some cardiovascular risks like elevated heart rate," said Shelley, who researches tobacco control, adding, "We don't know the full safety profile yet." A 2023 study that compared Zyn pouches to smokeless tobacco and nicotine replacement products found that while Zyn doesn't contain "nitrosamines or some of those real known cancer-causing agents, it does contain some chemicals like formaldehyde that the FDA has said are potentially harmful," she said
it is a medical recommendation backed by solid evidence
After an initial layer, more shisha is added and pressed down more firmly, reducing the size and number of air pockets
