Nicotine is the addictive substance found in tobacco crops. Benzoic acid is also naturally present in vegetation, and is used commercially in dyes, perfumes, insect repellants, and meals preservatives. Existing cell, animal, and clinical studies recommend that glycerin and propylene glycol irritate the liner of the lungs. One small medical research from 2018 that found that the compounds changed vapers’ sputum—the mucosal lining that covers the interior respiratory tract—to express completely different immune proteins. Some of these protein changes have been linked to bronchial asthma. Sign up for our Health Tip of the Day newsletter, and receive day by day tips that will allow you to live your healthiest life.

Juul