Nicotine is the addictive substance found in tobacco plants. Benzoic acid can be naturally found in plants, and is used commercially in dyes, perfumes, insect repellants, and food preservatives. Existing cell, animal, and medical research suggest that glycerin and propylene glycol irritate the lining of the lungs. One small clinical examine from 2018 that found that the compounds modified vapers’ sputum—the mucosal lining that covers the internal respiratory tract—to precise different immune proteins. Some of these protein adjustments have been linked to asthma. Sign up for our Health Tip of the Day publication, and obtain daily tips that may allow you to reside your healthiest life.

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