I quit smoking cigerettes 7 weeks ago and switches to vape (e-cig). 4 chemicals are in vape solution, prolylene glycol or vegetable glycerin, riboflavinoids, water, and (or) nicotine. I use to hold my breath at times when I use to smoke cigerettes, and I could last 1 minute. but now, I can hold my breath for over 2 minutes. is vaping dangerous.