Nicotine is the addictive substance present in tobacco plants. Benzoic acid can be naturally found in vegetation, and is used commercially in dyes, perfumes, insect repellants, and food preservatives. Existing cell, animal, and scientific research recommend that glycerin and propylene glycol irritate the lining of the lungs. One small medical examine from 2018 that found that the compounds changed vapers’ sputum—the mucosal lining that covers the internal respiratory tract—to precise totally different immune proteins. Some of those protein adjustments have been linked to asthma. Sign up for our Health Tip of the Day e-newsletter, and receive every day tips that will allow you to live your healthiest life.

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