Of all your symptoms, pay closest attention to the clear phlegm production. That is becoming a widely noted problem for e-smokers. And in clinical trials I've been somewhat privvy to, it happens with either PG or VG. Makes no difference. Both are impacting the lungs in the same humectant fashion, drawing moisture out that results in phlegm that must be cleared by coughing or repetitive clearing of the throat.
Suffice it to say this is both a short-term and, especially, long-term concern with e-smoking. Increased phlegm production would simply not be acceptable to any health regulatory agency on earth.
Ex-smokers' lungs are already damaged or compromised from years of sucking smoke into them. If PG and VG piles on more damage, COPD or worse might result.
As your other symptoms get better with a new liquid, keep close tabs on that phlegm production, which will be independent of flavor but correlated closely with the amount of vapor you inhale each day. With your pre-COPD conditions, you might find that you cannot tolerate e-smoking without further harming yourelf. You might need to find another nicotine alternative.
Suffice it to say this is both a short-term and, especially, long-term concern with e-smoking. Increased phlegm production would simply not be acceptable to any health regulatory agency on earth.
Ex-smokers' lungs are already damaged or compromised from years of sucking smoke into them. If PG and VG piles on more damage, COPD or worse might result.
As your other symptoms get better with a new liquid, keep close tabs on that phlegm production, which will be independent of flavor but correlated closely with the amount of vapor you inhale each day. With your pre-COPD conditions, you might find that you cannot tolerate e-smoking without further harming yourelf. You might need to find another nicotine alternative.