HNB (heat not burn) is a new type of tobacco products, also known as "HTP".
According to the definition on the official website of the World Health Organization (who), HNB tobacco products usually use battery powered heating systems to heat special cigarette ingredients to 350 ° C (lower than 600 ° C of traditional cigarettes).
The heating system in the equipment can be an external heat source for the precipitation of nicotine from specially designed cigarettes (such as iqos and glo), or it can be a heated sealed chamber to directly atomize nicotine (such as ploom and pax) in tobacco leaves
Traditional cigarettes can reach a high temperature above 600 ℃, so in addition to the release of nicotine, there will be thousands of chemical substances, most of which are toxic, harmful and even carcinogenic.
According to the current medical research results, although nicotine is a highly toxic substance, it is not the most harmful substance in tobacco. The carbon monoxide and tar produced by tobacco combustion are the real damage to cardiovascular and carcinogenic substances.
HNB heating non combustion products are based on this theory. Since high temperature and combustion will release toxic and harmful substances, if the cigarette is roasted at a relatively low temperature of about 300 ℃ without high temperature combustion, the problem of toxic and harmful substances released by tobacco will be solved.
Although iqos propaganda has done a lot of scientific research and confirmed that HNB has lower toxic substances than traditional cigarettes, this kind of "self talk" research results are not convincing.
Who also has the same opinion on the safety definition of HNB products
"There is no evidence that HNB tobacco products are less harmful than conventional tobacco products. Some studies funded by the tobacco industry claim that the formation and exposure of harmful and potentially harmful ingredients are significantly reduced compared to traditional cigarettes. However, there is no evidence that reducing exposure to these chemicals can reduce human risk. As a result, additional independent studies will be needed to confirm claims of reduced risk and injury. "
At the same time, who also gives recommendations for HNB
"All forms of tobacco use are harmful, including HNB tobacco products. Tobacco is inherently toxic and carcinogenic even in its natural form. Therefore, according to the WHO Framework Convention on tobacco control (WHO FCTC), HNB tobacco products should be subject to the policies and regulatory measures applicable to all other tobacco products. "
However, just like e-cigarettes, who only doubts about HNB, does not recognize some of the current academic research results, but never organizes related research.
Therefore, it is difficult to have a definite answer to how much harm e-cigarettes and HNB reduce compared with traditional cigarettes.
E-cigarettes are relatively better, and many experts have conducted relevant research. The British Ministry of public health has officially released the conclusion that "the harm of e-cigarettes is at least 95% lower than that of cigarettes". This theory has been confirmed and affirmed in the investigation report a few years later.
What is the harm of HNB heating non combustion products compared with traditional cigarettes?
Recently, the United States National Institutes of Health (NIH) conducted a related study on HNB, and concluded that the carcinogen content of HNB is about 10-25 times lower than that of traditional cigarettes.
Heating tobacco products and cigarettes
This study of NIH, entitled "comparative study on carcinogenicity of heated tobacco products and cigarettes", compares the current market heated tobacco products (HTP) and traditional tobacco, and analyzes the contents of eight carcinogens in the smoke emitted by the two products.
The researchers used six steps to conduct a comprehensive risk assessment to compare the health effects of the two products.
The first three steps generate relative potency factors with confidence intervals based on dose response analysis of cancer data.
The remaining steps include evaluating the emission data to obtain the confidence interval for the expected emission of each compound, calculating the change of cumulative exposure (CCE) by probability, and estimating the associated health effects by combining CCE with relevant dose-response information.
Finally, the data collected show that the cumulative exposure CCE is about 10 to 25 times lower when using heated tobacco products (HTP) instead of cigarettes. But at the same time, the researchers also pointed out that only eight carcinogens have been compared, so this is only a preliminary conclusion.
Electronic cigarette, HTP and cigarette
Many people are also concerned about the impact of e-cigarettes on health, because many media have been advocating that although e-cigarettes do not contain tobacco ingredients, the components in tobacco oil after atomization will reduce immunity, affect cell structure and cause cancer.
In fact, as early as 2018, Dr. Konstantinos farsalinos, a famous tobacco harm reduction expert, e-cigarette expert and heart disease medicine expert, has compared the hydroxyl emissions of HNB, e-cigarettes and ordinary cigarettes.
Yes, this is the famous Dr. Konstantinos farsalinos
The results of Dr. Konstantinos farsalinos showed that compared with cigarettes, the formaldehyde content of HNB device was reduced by 91.6%, acetaldehyde by 84.9%, acrolein by 90.6%, propionaldehyde by 89.0%, crotonaldehyde by 95.3%.
However, propionaldehyde and crotonaldehyde were not detected in e-cigarette, and the levels of other carbonyls were very low. Compared with 20 cigarettes, the carbonyl content decreased by 92.2% to 99.8% when 5g e-cigarette liquid was used. When comparing 20 high volume cigarettes with the same number of cigarettes, the measured emission reductions ranged from 81.7% to 97.9%.
It can be seen that in fact, the scientific research on e-cigarette and HNB (HTP) has been in progress, and the conclusions are positive, but they are often ignored by the government departments of most countries and organizations such as who. The United States, which has the largest market share of e-cigarettes, has not recognized HNB and e-cigarettes as "harm reducing products" and are classified as "tobacco products".
Therefore, whether e-cigarettes and HNB are harmful or not is often judged by science. However, with the passage of time and the progress of technology, more and more countries and regions have begun to open their closed doors to e-cigarettes and HNB. Recently, Hong Kong and Australia have gradually shortened the list of regions that say no to e-cigarettes. This also shows that in the future, as judged by tobacco giant Philip Morris International, it must be the world of new tobacco and the road of traditional cigarette At the end of the passage.