I found this vape juice that is usda certified with all natural ingredients and no nicotine or chemicals. is it bad for me to start using?

Goals?: It is not clear what the main substance is in the vaporizer. It comes down to what exactly you are trying to do by using it. Being inhaled it will alway pose a risk for your airways and lungs, specifically if used for extended periods of time.

Please don't Vape!!: Vaping even 1 nicotine-free electronic cigarette (e-cigarette) “can produce transient changes in blood vessels similar to those seen in early atherosclerosis” REF: https://www.medscape.com/viewarticle/917031. E- cigarettes may cause cough, irritation of throat/ mouth, nausea or headache. REF: https://www.bmj.com/content/360/bmj.j5543