Yeah, but I think it's the known vs. the unknown......
Vaping does not really caused phlegm. It is when you initially stopped smoking analogs that caused the phlegm. After a while, when your body get used to No-Analog regime, the phlegm will gradually subside and dry up. I remember when I stopped analogs and replaced with vaping, my nose-wax turned from the usual grossly dark/brownish color to suddenly clear/white. This remind me that analog-smoke contains high-level of carbon-tar substances. Nowadays, my nose-wax is normally clear/white.
Smoking took many years, even decades to give rise to worrying symptoms, whilst vaping is doing it, to at least some people, in only a couple of months. That's quick and if it gets worse at the same rate, could indicate vaping is far more dangerous than smoking. Doesn't help much if we're immune to cancer but die of respiratory disease.
I've been off the RY4 for 2 weeks now and my symptoms have all cleared up, at least to a much lower level. In the last 2 days, there's also been a noticable drop in the e-phlegm I cough up in the mornings. I'm still very hopeful I'm on the right track. No more flavour experimentation for me.
TropicalBob, can you tell us if the researcher tested on flavourless PG/VG liquids only, or is it possible flavourings played a role? I'm not (yet) frightened enough of the possibility of e-phlegm to give up my beloved new 510 yet, but I have shelved all liquids except flavourless since reading Doug_Dread's posts!He also flatly said, without any equivocation, that PG and VG both produced it. It is not a PG problem. It is a problem with both carriers presently used to contain the nicotine in solution. He said he would like to find another carrier agent.
Gator, what issues specifically are you having??
I've been vaping since Dec ... quit analogs at the same time. Experienced the initial "clearing of the lungs" for a week or so. No real symptoms until I started on VG about 2 weeks ago. No I am feeling like I am smoking analogs again. Feels really strange. I don't think its a cold so it has me concerned. I just bought a bunch of VG juice cause I liked the flavor. No I'm going to set it aside for a while and use the PG stuff to see if the issues continue.
Good thread... thanks to all.