I came across this link over the weekend regarding sub ohming. The part that stood out for me was this
Source : http://www.e-cigarette-forum.com/forum/rebuildable-atomizer-systems/562106-ecf-sub-ohm-advisory.html
Is this an over precaution, or is there any truth is in this?
2. Inhalation issues
It is likely that the super-heating of e-liquids that takes place in an RBA run at less than 1 ohm will create some toxic materials.
This is just plain logic and should not be seen as anything radically new: burning up refills creates some nasties and there is no way around that. It is likely that materials such as acrolein and aldehydes will be seen in measurable quantities, and some pyrolytic compounds may even be created.
Inhalation of sub-ohm vapor is probably not the same as regular vapor and therefore may have additional risk. It is likely to create conditions where potential carcinogens (cancer-causing agents) will be seen in measurable amounts, and so there must be some elevation of risk, which will escalate as resistance goes down and heat goes up.
We can regard this as significantly more important than battery safety at this time: there are no reported incidents of exploding APVs or house fires caused by sub-ohm rigs self-destructing; but there are probably thousands of people inhaling materials that are simply not present in vapor from a regular clearo run at 2.5 ohms.
Source : http://www.e-cigarette-forum.com/forum/rebuildable-atomizer-systems/562106-ecf-sub-ohm-advisory.html
Is this an over precaution, or is there any truth is in this?