Inhaling secondhand smoke is known to be detrimental, but even handling a smoker's clothing can cause cancer.
A new study conducted by Lawrence Berkeley National Laboratory found that smoke adhering to objects and clothing (called Third Hand His Smoke) Presence, contamination with toxins.
The research team had previously studied the effects of internal smoking and e-cigarettes and found that surfaces absorb and persist residues that carry dangerous toxins.
Tobacco-specific nitrosamines (TSNAs), produced as a result of the reaction of airborne nitrites with toxins, were investigated as part of a study published in the journal Environmental Science & Technology .
Touching surfaces or air, inhaling particles, or ingesting dust are among the ways TSNA can enter the body and remain for several days after contact. For example, sleeping on smoky bed sheets is one way of TSNA exposure.
"Since we first described this chemistry in 2010, several studies have further demonstrated the presence of TSNAs and dust deposits on indoor surfaces." said Berkeley Lab chemist Hugo Destaillats in media release.
According to Detaillats, researchers used information collected over the past decade to determine, " when living in a third-hand smoke-contaminated We have estimated the daily dose that people could be exposed to."
"Nicotine is released in large amounts during smoking and covers all indoor surfaces, including human skin," Xiaochen Tang, the leader of the experience, said in a press release, adding that skin oils and sweat actually "results in higher yields of TSNA in the presence of nitrite."
Two types of carcinogenic TSNAs, known as NNK and NNN, can be formed by indoor smoking. A third type, known as NNA, which is not present in cigarette smoke, was also studied.
NNA genotoxicity by assessing the effects of NNA on cultured human lung cells,” said study co-author Bo Hang. "Contact with NNAs led to DNA damage, including double-strand breaks, the most detrimental genotoxic consequence." They point out that NNK causes cancers, including liver, lung, and pancreas, and suggest that its presence can have toxic effects in humans. Researchers have found that the toxin remains in the blood for days, even after not being near cigarette smoke or contaminated surfaces. We found that NNK dosages exceeded the health guidelines provided by the California Office of Environmental Health Hazard Assessment under "comfortable indoor conditions." According to Proposition 65, NNK levels have been found to be above a "non-significant risk level," which increases the risk of developing cancer.
"These findings demonstrate the potential health effects of third-party smoking, including TSNAs as well as hundreds of other chemicals, some of which are carcinogenic. It's also known as matter," said co-author Neal Benowitz. consortium. “Next steps in this research will explore in more detail the mechanisms of adverse health effects associated with tobacco and cannabis residues, effective remediation strategies, and the translation of scientific findings into tobacco control practice. ''
