Hello went to the ER because of some chest pain had an xray done and showed i had mild copd im in shock here had no clue only 39 years old can't believe this .Well i need help from some fellow members who also suffer from copd how do you vape vg vs pg flavored vs unflavored? right now im vaping allmost 5 ml of pure vg nic at 18mg and 20% flavoring from tpa thinking on going flavorless .Side note the doctor gave a thumbs up to vaping so happy thank you everone.