In an article regarding the FDA's concern about toxicity levels in e-liquid, it is stated that, "... when either propylene glycol or glycerin are heated to too high a temperature, they degrade into other chemicals that may be problematic, especially aldehydes such as formaldehyde and acrolein, which could be toxic if inhaled at high levels for many years. Vaping products that have careful temperature control, overcharge protection, etc., do not present a high risk of producing these unwanted chemicals. However, products without these safety features could potentially be problematic.” The person who said this is Michael Siegel, Professor of community health sciences at the Boston University School of Public Health and who is in favour of vaping. I am thus taking his concerns seriously. This is not the first time that aldehydes have been mentioned in articles, but my question is - what is defined as a "high level"? This is never stated. My iJust 3s, when fully charged, vape at 80W apparently. ls that a "high level"?