New study shows High Voltage vaping may not be safe

[Bluesmaster75]

http://www.nejm.org/doi/full/10.1056/NEJMc1413069
Take a look at figure 1 especially. I think I'm gonna go back to standard ego batteries

 

[VBdev]

Thanks for sharing.
So he used 3.3 volts for low voltage and 5.0 volts for high voltage. What temperatures were involved? How much air crossing over the coil? What's the coil resistance and atty used? Also did he say where the Formaldehyde is coming from? Is it primarily being broken down from the PG or VG or other or all or some?

Glad the DNA40 is giving me controls of temp, but using it I think has helped me understand the air flow - temperature relationship better in practice so I think my vaping on other devices has improved as a result. I may bump my wattage down, so higher resistance on the mechs and a few button presses on the regulated mods after reading that though. How much air you have passing over those coils, and how hard you are sucking makes a big temp difference. Id say a hard draw at 30 watts can be lower temp AKA safer than a lazy soft draw at 20 watts IMO.

 

[Bluesmaster75]

More Info*******


Carbonyl Compounds in Electronic Cigarette Vapors: Effects of Nicotine Solvent and Battery Output Voltage
By:Kosmider, L (Kosmider, Leon)[ 1,2 ] ; Sobczak, A (Sobczak, Andrzej)[ 1,2 ] ; Fik, M (Fik, Maciej)[ 2 ] ; Knysak, J (Knysak, Jakub)[ 2 ] ; Zaciera, M (Zaciera, Marzena)[ 1 ] ; Kurek, J (Kurek, Jolanta)[ 1 ] ; Goniewicz, ML (Goniewicz, Maciej Lukasz)[ 3 ]
NICOTINE & TOBACCO RESEARCH
Volume: 16 Issue: 10 Pages: 1319-1326
DOI: 10.1093/ntr/ntu078
Published: OCT 2014
Abstract
Introduction: Glycerin (VG) and propylene glycol (PG) are the most common nicotine solvents used in e-cigarettes (ECs). It has been shown that at high temperatures both VG and PG undergo decomposition to low molecular carbonyl compounds, including the carcinogens formaldehyde and acetaldehyde. The aim of this study was to evaluate how various product characteristics, including nicotine solvent and battery output voltage, affect the levels of carbonyls in EC vapor.

Methods: Twelve carbonyl compounds were measured in vapors from 10 commercially available nicotine solutions and from 3 control solutions composed of pure glycerin, pure propylene glycol, or a mixture of both solvents (50: 50). EC battery output voltage was gradually modified from 3.2 to 4.8 V. Carbonyl compounds were determined using the HPLC/DAD method.

Results: Formaldehyde and acetaldehyde were found in 8 of 13 samples. The amounts of formaldehyde and acetaldehyde in vapors from lower voltage EC were on average 13- and 807-fold lower than in tobacco smoke, respectively. The highest levels of carbonyls were observed in vapors generated from PG-based solutions. Increasing voltage from 3.2 to 4.8 V resulted in a 4 to more than 200 times increase in formaldehyde, acetaldehyde, and acetone levels. The levels of formaldehyde in vapors from high-voltage device were in the range of levels reported in tobacco smoke.

Conclusions: Vapors from EC contain toxic and carcinogenic carbonyl compounds. Both solvent and battery output voltage significantly affect levels of carbonyl compounds in EC vapors. High-voltage EC may expose users to high levels of carbonyl compounds.

 

[retired1]

Until we know what controls were placed on the study (length of time current was applied, was the wick saturated during the entire period, etc. etc. etc.) I wouldn't get too alarmed as yet.

 

[JAS6377]

I agree. I'm not personally going to discount the fact that aldehydes can be formed through vaping, but I believe a more inclusive study must be done. I'm very interested in things like temperature/airflow, wattage, and heat flux, as I believe they may be the most pertinent factors alongside juice composition.

I for one am happy that studies are being done, paid or not. They may lead into independent labs taking over and properly testing all variables.

 

[DadEh]

I'm not going to spew out a lengthy diatribe on this topic. Short, sweet (or maybe not so sweet) but to the point.

I am getting sick, sore and tired of the scare mongering for the vaping community and especially those that are considering it.
I agree with Jay. More testing by impartial independent bodies etc etc.

For the meantime, I have found something that has aided me hugely in quitting the annalogs and until firm proof/facts are presented to me, I will continue being a QUITTER (and proud of being such) and consider my option at a later date.
I know this appears blasé but I have not been succesful on any other smoking cessation product, that hold their own risks.

K..... I'll get off my soap box now

 

[Bluesmaster75]

I'm not going to spew out a lengthy diatribe on this topic. Short, sweet (or maybe not so sweet) but to the point.

I am getting sick, sore and tired of the scare mongering for the vaping community and especially those that are considering it.
I agree with Jay. More testing by impartial independent bodies etc etc.

For the meantime, I have found something that has aided me hugely in quitting the annalogs and until firm proof/facts are presented to me, I will continue being a QUITTER (and proud of being such) and consider my option at a later date.
I know this appears blasé but I have not been succesful on any other smoking cessation product, that hold their own risks.

K..... I'll get off my soap box now

I agree with you and this study came up because somebody on my facebook(non smoker of course) tried to use this study as the end all be all study and when I read the study and checked the parameters which are all there if you click on all the available links, I explained to the poster that the majority of E-cig users would most likely fall into the lower voltage category and that although formaldehyde was present at higher voltage , we(vapers) by vaping are still not inhaling the other 700 plus carcinogens that are present in real cigarettes. I just thought it wise to share as I'm sure we have some cloud chasers here using high voltage and sub ohm coils and quite honestly I'd rather err on the side of caution instead of blindly dismissing a peer reviewed study that according to the affidavits was paid for by the school and no one else.

 

[Scottitude]

There are other threads on this "study" that explain exactly how the parameters were set to achieve the "scientists'" desired outcome.

Look for Bill Godshall's comments.

 

[DadEh]

Took another read as I like to do such things.
YAYYYYYY ME I'm under 5v so I get to live to 100.

 

[Rat2chat2]

Verified: formaldehyde levels found in the NEJM study were associated with dry puff conditions. An update

This was a pretty good read. Check it out.

 

[Bluesmaster75]

Verified: formaldehyde levels found in the NEJM study were associated with dry puff conditions. An update

This was a pretty good read. Check it out.

That is some good news and I hope they repeat the experiment and post those results as well. I'm still gonna stick with my Ego-C and evods though. I'm more about the quitting smoking vs getting the biggest clouds and hottest vapour.

 

[Regzzz]

hahaha I had to laugh...

Gutfeld: New e-cig study goes up in smoke| Latest News Videos | Fox News

 

[Heavyrocker]

Gregory Conley, a lawyer with the American Vaping Association, an advocacy group for e-cigarettes, criticized the study methods.

"They use the device in a manner that no one does," he said.

Using the high voltage for as long as the researchers mimicked in the study "creates a burning, acrid taste" called a "dry puff" that would cause users to adjust the e-cigarette, Conley said.

What the researchers did is like leaving a steak on a grill all day — many cancer-causing substances might be formed but no one would eat such charred meat.