【電子タバコ】IQOS(アイコス)は紙巻タバコより高濃度発がん性物質を含んでいることが判明

現在、紙巻タバコに代わって、電子タバコの市場が劇的に拡大している。我が国における人気のほども、街中の販売店に立ち並ぶ購入希望者を見れば一目瞭然だろう。特に、米「フィリップモリス」社の加熱式タバコ「IQOS(アイコス)」の普及には驚かされるばかりだ。

しかし、ここにきて、安全性を謳う「IQOS」に暗雲が立ち込めている。 スイス・ベルン大学の研究者らが「IQOS」の危険性を独自に調査した結果、直接的に“がんの原因”となる化学物質が「紙巻タバコよりも多い」ことが分かったというのだ。

国際ニュース通信社「Reuters」(5月26日付)によると、「フィリップモリス」社から販売されている「IQOS」用タバコに「一酸化炭素」、「多環式芳香族炭化水素」、「揮発性有機化合物」といった有害物質が含まれていることが分かったという。分析にあたった研究者らは、「これらの有害物質に安全な最低基準は存在しない」ため、どんなに少量でも人体に有害であるとの見解を示している。

さらに、「フィリップモリス」社の紙巻タバコ「Lucky Strike Blue Lights」と比較したところ、IQOS用タバコには、これより高濃度の有害物質が含まれていたというから驚きだ! 「従来のタバコに比べて90%の有害物質をカット」を謳う「IQOS」にとって、これは致命的だろう。
(中略)
電子タバコには確かに「臭いが少ない」、「火傷の危険が少ない」といったメリットもあるが、健康面では、利用者がイメージしているような安全性には達していない、というのが現状なのかもしれない。研究チームのレト・アウエル教授も「加熱式タバコの有害性については分かっていないことが多く、評価が定まるまで使用は制限されるべき」と語っている。

つまり、普通の煙草は健康に悪いから、アイコスにしたのに、さらに健康に
悪くなっていたというオチ

By Lisa Rapaport
(Reuters Health) – – A new type of “heat-not-burn” cigarette releases some of the same cancer-causing chemicals found in traditional cigarette smoke, a recent experiment suggests.

Researchers analyzed the chemical compounds and nicotine in smoke from traditional cigarettes and from the new devices, which are designed to heat disposable tobacco sticks and give users the taste of tobacco without the smoke or ash.

The smoke released by this “heat-not-burn” cigarette had 84 percent of the nicotine found in traditional cigarettes, researchers report in JAMA Internal Medicine.

Heat-not-burn cigarettes also released chemicals linked to cancer including carbon monoxide, volatile organic compounds (VOCs), and polycyclic aromatic hydrocarbons (PAHs).

The research team was surprised to find that heat-not-burn cigarettes “released some of these chemicals in much higher concentrations that conventional cigarettes,” said lead study author Dr. Reto Auer of the University of Bern in Switzerland.

“We need more studies to find out about the health consequences” of smoking heat-not-burn cigarettes, Auer said by email.

“However, there is no safe minimum limit for some of the chemicals” in heat-not-burn cigarette smoke, Auer added, “and some of these chemicals may contribute to the high mortality rate of smokers.”

To see how heat-not-burn cigarettes compared to conventional cigarettes in terms of chemicals released, Auer and colleagues analyzed the smoke from Lucky Strike Blue Lights and the newer alternative tobacco devices using a smoking device developed to capture fumes from traditional and electronic cigarettes.

They looked at the contents of the I-Quit-Ordinary Smoking (IQOS) product from Philip Morris International with an IQOS holder, IQOS pocket charger, Marlboro HeatSticks regular and Heets.

While more studies are needed to determine the long-term health effects of heat-not-burn cigarettes, their use should be restricted until more is known about them, Auer argues.

“Harmful chemicals were present in IQOS smoke, though in lower concentrations, on average,” Auer said. “We need to conduct more studies to find out whether IQOS are safer for users or bystanders.”

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Based on their findings, the authors conclude that heated tobacco products should fall under the same indoor smoking bans in place for conventional cigarettes to prevent bystanders from breathing the fumes.

That’s because the new tobacco products threaten the progress that has been made on decreasing the harms of second-hand smoke, because existing bans may not apply to heat-not-burn cigarettes, Dr. Mitchell Katz, deputy editor of JAMA Internal Medicine wrote in an editor’s note accompanying the study.

“There is concern that heat-not-burn tobacco will skirt local ordinances that prevent smoking in public areas,” Katz, director of the Los Angeles County Health Agency, said by email.

“This would harm public health by eroding social norms about the use of tobacco,” Katz added. “In addition, the article demonstrates that heat-not-burn products release carcinogens, so the use of these products in public space would harm the health of both the user and those around the user.”

SOURCE: bit.ly/2qsh1nH JAMA Internal Medicine, online May 22, 2017.