According to a new study, researchers estimates that vapers using low rather than high nicotine e-cigarettes may be using their devices more intensely, potentially increasing the risk of exposure to toxins in the vapour. The study was published in Addiction.
Researchers studied 20 e-cigarette users and found that people using low nicotine e-liquid in their devices puffed more deeply and more often than those using high nicotine liquid. Those using low nicotine also increased the power of their vaping devices when possible.
Despite this 'compensatory' behaviour, the low nicotine vapers were unable to get as much nicotine as the high nicotine group. But in their quest to do so their puffing behaviour may have increased their exposure to toxins such as formaldehyde, a chemical formed when the e-cigarette liquid is heated.
While there can be toxic chemicals present in vapour, they are far fewer and generally at lower concentrations than in tobacco smoke. Evidence so far still shows both high and low nicotine e-cigarettes are far less harmful than smoking.
Vaping more intensely and at higher power raises the temperature inside the device which can cause the glycerine and glycol found in most e-liquids to break down.
This raises the risk of exposure to chemicals. While this exposure is generally still at far lower levels than with smoking, it should be minimised where possible. The low nicotine group also reported a stronger urge to vape, more acute withdrawal symptoms and were less satisfied after use.
This is similar to the evidence on using nicotine replacement therapy (NRT) in a quit attempt that shows that smokers need a sufficiently high dose of nicotine to increase their chances of successfully giving up tobacco by reducing cravings.
But this research suggests that a low nicotine approach may not be the best for everyone or the safest path to a successful attempt to give up. First time vapers should be prepared to experiment to find what suits them best and helps them to give up for good.