P.S I SMOKE E CIGARETTES & HAVENT SMOKED IN ALMOST 7 MONTHS:-) says:Dodgy Dave Propelyne Glycol is safe in small quantities infrequently, but I wold not want to vape it all day every day as the effects are unknown and yes it is the KEY ingredient in antifreeze
But as I said: We dont know for sure as yet, he says

Department of Health and Human Services) You Can Quit Smoking Quite Guide (QuitPlan) Smoking Cessation Book Never Take Another Puff (Joel Spitzer) Smoking Cessation Websites Online Programs Freedom From Smoking Online (American Lung Association) Smoking Helplines Louisiana QuitLine: 1-800-QUIT-NOW (1-800-784-8669) National Cancer Institute QuitLine: 1-877-44U-QUIT (1-877-448-7848) Mobile Apps QuitSTART App (National Cancer Institute) SmokefreeTXT (SmokeFree.gov) Web Pages I Want to Quit Smoking (American Lung Association) No Safe Level of Smoking: Even low-intensity smokers are at increased risk of earlier death (National Cancer Institute) Quitting smoking: 10 ways to resist tobacco cravings (Mayo Clinic) Electronic Cigarettes: E-Cigarettes (American Academy of Pediatrics) (handout) E-cigarettes (California Youth Advocacy Network) (handout) E-cigerattes (European Lung Foundation) (handout) Electronic Cigarettes (Cardiology Patient Page, Grana et al, 2014) (journal article) Electronic Cigarettes (Denver Public Health) (handout) E-Cigarettes Fact Sheet (Center for Public Health and Tobacco Policy) (fact sheet) E Cigarettes- Frequently Asked Questions (Marie Keating Foundation) (web page) Electronic cigarettes: Not a safe way to light up (Mayo Clinic) (handout) Electronic Cigarettes: What You Need to Know (American Academy Family Physicians) (handout) Electronic Smoking Devices and Secondhand Aerosol (ANR) (handout) Frequently Asked Questions About Electronic Cigarettes (Memorial Sloan Kettering Cancer Center (handout) The Electronic Cigarette (American Thoracic Society) (handout) What We Know About E-Cigarettes (smokegree.gov) (web page) What You Should Know About E-Cigarettes (American Heart Association) (booklet) Chewing or Smokeless Tobacco: A Complete Guide to Chewing Tobacco: Effects, Addiction, and How to Quit (Quit Smoking Community) (web page) Chewing tobacco: Not a safe product (Mayo Clinic) (handout) Smokeless Tobacco: A Guide for Quitting (National Institutes of Health) (booklet) Smokeless Tobacco and Cancer (National Institutes of Health) (web page) Quitting Dip (Smokefree.gov) (web page) Cigars: Cigars (American Thoracic Society) (handout) Cigar Smoking and Cancer (National Institutes of Health) (web page) Cigar Smoke is Toxic (quitnow.gov.au) (handout) Cigar Smoking: Safer than Cigarette Smoking

it may feel too controlled for smokers seeking strong impact it does not focus on bold or aggressive profiles it prioritizes refinement over variation These are not limitations, but the result of its positioning
A well-sealed joint prevents airflow issues and keeps the structure intact, allowing for a smooth smoking experience