I had been tapering down my nic level over several months and was down to 2mg or 3 mg, depending on the juice. Then, I had to go in for a heart cath and got a real awakening. I have at least three arteries that are each at least 60% blocked. My cardiologist, who had previously been supportive of my vaping, said "no more." He wanted me to immediately cut out any nicotine I was still using. (Of course, there have been some drastic changes in my diet, too). It hasn't really been that hard since I was at such low levels, anyway. I have to admit, though, (and don't tell my wife or doctor this), that I still keep one bottle of 5mg handy "just in case." Too often, I think we get the mistaken impression that since we've kicked cigarettes then our health is suddenly all better and we can quit worrying about our lungs and heart and arteries. Unfortunately, though, the damage has already been done and, by quitting, we're just avoiding any ADDITIONAL damage. We may be able to breathe better but our chances of heart disease and lung cancer are still sky-high. I hate to be a downer, but it's just the facts, my friends.