Is 3 year old vape juice safe? : r Vaping How Do I Know My E Liquid is Safe? RED Box Vape Red Box Vape Does Vape Juice Expire? Tips to Preserve Your E Liquid Generation V Is Vape Juice Safe: What Goes Into UK E Liquid? WHAT PARENTS NEED TO KNOW: We know that vaping is NOT a safer alternative to smoking, and by the time longevity studies on vaping come out, the damage on our teens' lungs If you vape, you inhale a lot of harmful substances. These can damage your heart and lungs.